Gradient banding in CS4

I just updated to CS4 and now all my files that use a lot of gradients have heavy color banding. These images were very smooth in CS3. When I try creating new gradients, the same happens, even at 32bit. I'm guessing that a default setting has changed. I played around with proof settings, but nothing helped. None of this is for print. Any help?

Turn off OpenGL in the prefs. Most likely it's texture quantisation due to insufficient graphics hardware.
Mylenium

Similar Messages

I have CS4 Ilustrator and am having problems with gradient banding. I'm ripping files through Wasatch 6.7 to a Roland SC-540 printer.

I have CS4 Ilustrator and am having problems with gradient banding. I'm ripping files through Wasatch 6.7 to a Roland SC-540 printer. Is there a fix for this? Please let me know, I have been asking here for a few days here and no answers yet? Josh

I have CS4 Ilustrator and am having problems with gradient banding. I'm ripping files through Wasatch 6.7 to a Roland SC-540 printer. Is there a fix for this? Please let me know, I have been asking here for a few days here and no answers yet? Josh

Gradient banding in Samsung 20 inch LCD

Now idk where to begin, ok here's the best info i can give
I just assembled a new pc for graphic work/budget gaming 2 days ago:
intel core i3 530 mhz
2 gb ddr3 ram 1333 mhz
xfx nvidia geforce gt 240 1gb ddr5
windows 7 ultimate 32-bit
Samsung Myst Eco B2030 widescreen 20 inch lcd monitor
Now when i opened an old psd which contained some brushing and gradients, i could see bands in the gradients, even the wallpaper i put had bands on it. I even noticed that everything on my lcd looks hellish sharp, and when i force my head really close, i can see small square pixels all over the l cd. Is it due to the analogue output(VGA)?, should i switch to DVI?
I use 1600x900 res (native) at 32 bit
Then to test whether all gradients look the same, i opened a new ps document and made a black to white gradient, but it was smooth, there were no bands in there. But when i made a simple white box, applied full gaussian blur, and zoomed in around 2000% i could see the gradual bands again though not as bad as in the colored psd. It seems the problem only happens when i give a glow, or blurs. Then i played Splinter Cell Conviction (everything Maxed out) and again i could see gradient bands forming up in dark places, like when i die and a small cutscene is played, i could see gradient bands on the 4 corners. What could be the problem, is it the card? the lcd? i am new to lcd monitors so i dont know how to calibrate or whatever.
Please check if anyone else can see the bands on their lcd?

Regarding calibrating your display, it's not strictly necessary, but you did mention "oversaturation" in a post above. It's certainly your call whether you want to make your color-managed applications put out calibrated color.
Re switching to DVI, that's falling out of favor... How are you currently cabled to your monitor? HDMI? VGA? You've mentioned both. DVI would CERTAINLY be better than VGA.
This "Coarse effect" you speak of... Are you talking about jaggy fonts, or what? If so, do you have Font Smoothing enabled?
When I first switched from CRTs to LCDs (in 2004) I marveled that most graphics created by people using CRTs were actually butt ugly, simply because they could not see the actual image content very clearly and tended to overlook things and overcompensate for their own monitors' shortcomings.
On a good LCD using a good interface (DVI or better) you can see every pixel as a discreet element. That's a given.
After my switch from CRT to LCD I had to reset my perceptions - I had thoughts just like yours! After a while you start to realize that what may look oversharp and harsh to you may even still be too subtle for CRT users. For some time there's been a mix of CRTs and LCDs in the world, though honestly lately I've started to ignore the former as they are truly a dying breed (just try to buy a new CRT monitor nowadays). It is not wrong to concentrate solely on making graphics look good on ultra sharp LCD monitors. Don't be too hard on yourself for what you've produced in the past, when you couldn't "see clearly" yet.
That said, I should note that there are some LCDs that are not sharp at all. From time to time people post on this forum that they have trouble seeing the Photoshop UI elements at their fixed small size, and as you're no doubt aware now with your monitor there's really no problem seeing them on a very sharp display.
You could try taking a macro photo of what you're seeing on your display that you don't like. Other than that it's very difficult to communicate about such issues on a forum.
-Noel

How to apply gradients in Dw CS4?

Hello;
I have been using gradients in Flash CS4.It's not that difficult,using the radial and lineair gradients.
However in Dreamweaver I can't find such a feature.For my knowledge it is only possible to use straight colors.
Does anyone know how to use gradients in Dreamweaver??
Many thanks for the help!

Dreamweaver is not an image editor.
It uses HTML and CSS to insert colours in pages. HTML and CSS only do solid colors.
If you need gradients, you must create them in an image editor such as Photoshop or Fireworks then insert the image into your webpage in DW using CSS.

Dithering (gradient banding) in 32 bit Win 7 on iMac

Heyo, all!
Love my Mac but some things, mostly games, aren't available except on the PC.
When I use boot camp and boot up using Windows 7, I am seeing dithering (gradient banding) on the desktop and in some applications. Generally anything that displays unbroken color gradients and shading. I've tried updating the video drivers but nothing has worked, to date. I'm using a ATI Radeon HD 4850.
Odd thing: In VMWare fusion, no problem, shows fine. When I was using WinXP, no problem, shows fine.
Am I missing setting, somewhere?

sorry if I ask a few silly question :o) :
I assume you are running Eclipse version is 3.5.2 (help/about eclipse platform) ?
And you do "file-new-Other" (don't forget the "other") and you don't see a tab "Oracle Service Bus"?
And if you do "servers, new, server" can you see "Oracle WebLogic Server 11gR1 PatchSet 2 " ?
pierre

Gradient Banding

Over the years, working with Illustrator, I've come to expect that Illustrator just has issues with creating gradients, and the only way to get a good smoothly transitioned gradient is to use Photoshop. I'm really suprised that Adobe hasn't solved this by now. I've been reading posts about gradient banding only in dark shadows, that the banding goes away when printing, or people just trying to say that a particular gradient just can't be recreated due to the limitations of a mathmatically defined gradient. I understand completely that the gradients in Illustrator are mathmatically defined, but essentially, so are the gradients in Photoshop, even if they end up being rendered as a bitmap, correct? I also understand that images can have stepped gradients as a result of either color profile gamuts, or bit depth, however the banding I've run into is not a result of monitor issues, limited color gamut, bit depth, or excessively dark gradients and the banding is in Illustrator, shows up in the exported file (tiff, I've also tried rasterizing the AI file in Photoshop with 16bit bit depth and still got banding) as well as prints, because it's IN the file. Below is a Tiff file that shows a gradient created in Illustrator CS6 on the left, Photoshop in the middle and the original art from Illustrator on the right. You won't be able to see the banding in the file unless you download it and view it at 100%.
So, the question is, is there a workaround in Illustrator, or a alternate way of creating gradients directly in Illustrator that will prevent this banding that I've somehow been missing in the 10 years I've been working with it? Also, Adobe, is anyone there trying to solve this problem?
-Matt

Over the years...I've come to expect that Illustrator just has issues with creating gradients...
And what other vector drawing programs have you used which have no occurrence of gradient banding?
...and the only way to get a good smoothly transitioned gradient is to use Photoshop.
Contrary to popular misconception, raster imaging is not immune to gradient banding. Consider: Everything you view on your monitor is a raster image.
I'm really suprised that Adobe hasn't solved this by now....I understand completely that the gradients in Illustrator are mathmatically defined, but essentially, so are the gradients in Photoshop, even if they end up being rendered as a bitmap, correct?... Also, Adobe, is anyone there trying to solve this problem?
What do you expect Adobe to do about math?
I've been reading posts about gradient banding only in dark shadows, that the banding goes away when printing, or people just trying to say that a particular gradient just can't be recreated due to the limitations of a mathmatically defined gradient.
This has been discussed at length many times in this forum. What part of what you've read do you not understand, or to what specifically do you take exception?
I also understand that images can have stepped gradients as a result of either color profile gamuts, or bit depth, however the banding I've run into is not a result of monitor issues, limited color gamut, bit depth, or excessively dark gradients...
How do you know the banding you're seeing is not a result of any of those issues?
...and the banding is in Illustrator, shows up in the exported file (tiff, I've also tried rasterizing the AI file in Photoshop with 16bit bit depth and still got banding)...
Where are you viewing the Illustrator, TIFF, and Photoshop grads? (On your monitor.)
...as well as prints, because it's IN the file.
It's in what you're viewing (the print). To see if the same banding pattern is in the image file, open the image file, count the bands, and actually measure and compare the pixel color values between the bands.
Below is a Tiff file that shows a gradient created in Illustrator CS6 on the left, Photoshop in the middle and the original art from Illustrator on the right.
No, below is a JPEG assembled from screenshots from your monitor.
You won't be able to see the banding in the file unless you download it and view it at 100%.
You can see the banding at multiple zooms. The bands change because of the resampling that your video system performs when it resamples on the fly when zooming or scaling.
...is there a workaround in Illustrator, or a alternate way of creating gradients directly in Illustrator that will prevent this banding that I've somehow been missing in the 10 years I've been working with it?
There is no workaround that will prevent all banding in all grads in all situations in Illustrator or any other program. So you'll have to be much more methodical and specific in your question if you really want to understand what is going on.
All images have banding, just as all raster images have "jaggies" (square-shaped pixels). The issue in both matters is to make them fine enough to be negligible. Visible "jaggies" is a mathematical conseqence involving the factors of pixel size and halftone dot size. Similarly, visible banding is a mathematical consequence involving the factors of number of tones (for each color channel or separation ink) that an imaging device (monitor or press) can render, and the distances spanned by each possible value step.
When you send a linear grad command to a PostScript device, you are sending a command to vary from color A to color B across distance D in however many steps the device can handle. The device does what it physically can within its hardware limitations. Same is true for your monitor. But the limitations differ between the devices.
So the banding you see on your monitor differs from the banding you will see on your desktop printer and from the banding you will see on film seps and from the banding you will see on press. The specifics depend on the specifics of the artwork and the imaging systems.
Your monitor can display 32 bit color. But how many of those values are available to paint a gradient across a distance depends on how many different colors--and how different they are--to be displayed across how many monitor pixels.
Your desktop printer has a fixed number of printer spots. The printer spots are used to build up halftone dots of varying size. How many different sizes of halftone dots (how many levels of gray) the printer can build is a mathematical function between the number of printer spots and the number of halftone dots available within a given distance. If the differences in adjacent tones (for each color separation involved) is finer than the differences between possible gray levels of the halftone screen, posterization occurs and you see it as bands in a linear grad.
An imagesetter has a greater number of printer spots and can therefore build more different sizes of halftone dots for any given halftone ruling than can your desktop printer. So it is less prone to banding because it is able to render more levels of gray. But it is not immune. You can still exceed its possibilities by demanding finer differences in tone steps than it can reproduce.
Banding is quite often ameleorated in print because (depending on the number of component inks involved in the subject color), the bands occur at different places on each color separation. So the resulting bands in the composite are narrower than on the individual seps, and therefore less evident. The same principle occurs on your desktop printer, but at a courser scale, because it is still a lower resolution device.
Banding is just as likely to occur in mathematically applied linear grads in raster imaging. The rasterization is not deferred to print time, it goes ahead and occurs. But the same principle applies. You are still telling the program to change the values of a fixed number of pixels in 8-bit channels. The result is being displayed on your monitor's array of pixels. When printed, the result is being rendered on the printer's (or film's) array of halftone dots. So the banding quite likely occurs at different locations from where they occur on your monitor. In other words, I don't care what you're doing, your monitor is a poor simulation of the banding that will occur in final print. For one thing, everything you see on your monitor involves three "separations" (RGB), not four.
The myth that raster imaging is somehow magically immune to banding stems from the fact that raster images are very frequently not really linear grads, but scattered dithering patterns (otherwise known as noise). If you use a linear grad tool in a raster image program to paint a linear grad across a broad distance of pixels, you can create banding just as you would in a vector-based program. If you do, then the bands are "nailed down" (rasterization is not deferred to print time) and if the imaging device has sufficient resolution, it will faithfully reproduce that same banding.
Back when raster file size was a much greater issue than it is nowadays, there were 8-bit raster imaging programs (Color It! being one example) which could make beautiful images using only 256 different colors. How did they do it? By effective use of dithering. The differences in adjacent colors were greater than those of a 24-bit image. But they were mixed and scattered so as to simulate additional colors, just as the droplets from an airbrush spraying a single color can result in the perception of multiple tones, just as a halftone screen does the same thing. Well, the nature of raster imaging is like that. Zoom way into what looks like a smoothly graduated sky and you'll see that it is in fact a scattered mixture of different values (noise).
Vector-based grads don't involve noise. They're just mathematical commands sent to the printer's interpreter. If you must, though, you can assign noise as a raster effect to your vector objects, and it can reduce visible banding because what you would really be sending to the printer ultimately is a dithered raster image.
So you just have to use some educated (i.e.; experienced) discernment when creating grads and when interpreting what you see on your monitor. And bear the general rules-of-thumb in mind:
The greater the distance spanned, the fewer component inks involved, the smaller the color change, the lower resolution the imaging device...the greater the likelihood of banding.
Set up some simple tests using simple grads in methodically arranged different values. You can build such a test array on a single page, just as you would build an array of color chips. Print it. Study the results.
JET

Gradient banding issues in CS3

CS3 has a gradient banding problem that no-one seems to be openly acknowledging or addressing.
If i make a graduated background in either Illustrator or Photoshop there is obvious banding in the gradient fill.
I have researched the problem on the net and it seems that many people are experiencing this problem but that there is no known solution or patch form Adobe to fix this. Only useless suggestions about work arounds for this simple exercise. Interestingly several people report never experiencing this problem until they upgraded from CS to CS3. I also fit this category.
I run a mixed Mac/PC network and CS3 produces fairly large background gradients perfectly in PS on my PC, though not in Il. My macs fail to produce gradients of any useful size without significant banding in both PS and Il.
I know that many other people have this issue - when is Adode going to publish something useful to address it?

John,
Where do you get the idea that Document Raster Effects settings should match a "document resolution" of 5080 or 2540?
> "300" is way too low ( if you are referring to document resolution, not image resolution )
Document Raster Effects
is a raster image resolution setting: it's the resolution of the raster images that are created by Illustrator's raster effect features. Specifying a raster resolution that is 1:1 with an imagesetter's dpi is ridiculous.
Further, where exactly is it that you "usually" set a "document resolution" in Illustrator CS3? The document resolution setting in earlier versions was simply the flatness setting, and defaulted to "800 dpi" (which is a flatness of 3, assuming a 2400 dpi imaging device). That setting is no longer even present in Illustrator, since (as I recall) AI 10. Flatness had nothing to do with grad fills; it affects curve accuracy.
You guys are talking about a problem with banding--the OP implying that he has been investigating the problem for some time--responders even offering suggestions to "fix" it. Yet no one in this thread has yet stated any of the
specifics that are necessary to even talk about banding:
Where
is the problematic banding occurring? Paddy Rogers does not even say whether he is talking about banding
on screen or in
output.
Assuming the banding is in printed output, what kind of device is it? If it's an imagesetter, is it using PostScript level 3?
What are the CMYK color values between stops of the of the page-size grad fill?
What is the size of the page (distance the grad spans)?
What is the halftone ruling being used?
These suggested "fixes" are myths:
Rasterizing the artwork
This is nonsense. It doesn't matter if the color values across a uniform grad are from vector commands or actual colors of pixel bands. Raster grads yield banded results just as easily as vector grads do. Banding is a function of the dot size and halftone ruling of a printing device. Rasterizing doesn't magically increase the resolution of a printing device.
Setting Raster Effects Resolution to a higher value
This has nothing to do with grad fills in Illustrator. A grad fill is not a raster effect.
Transparency Flattener Settings
Again, has nothing to do with banding in grad fills. A low setting may result in pixelation, not banding.
Antialiasing
Has nothing to do with banding in graduated fills.
Paddy, you claim that you are experiencing increased banding in both Photoshop CS3 and Illustrator CS3, as compared to the CS versions of those apps. Have you actually compared the
same files being sent to the
same printing device? If so, provide the specifics of a page-size grad that reliably produces the problematic banding. Be sure to state exactly what device you are printing to.
JET

Gradient banding on X220 IPS screen

Over on the Faint Ghosting on X220 IPS screen thread, I mentioned (twice, actually) that I see gradient banding on my X220 IPS screen. Nobody else has brought up this issue, and at the moment it seems that I may have a defective screen.
Here's a test image to check for gradient banding: http://www.lagom.nl/lcd-test/gradient.php. View and compare how it looks on other laptop and desktop monitors. Gradients appear smooth on my desktop PC (Dell monitor and low end Radeon card) and MacBook Pro, but banding is easily visible on my X220 with IPS screen. I even see faint banding when I view this forum, the subtle gradient background at the top of each post. My display is set to 32 bit color and 60 Hz refresh.
I'll take it up with Lenovo support. Meanwhile, anybody else who has the issue can post and discuss here.

I have the exact same problem.
When there is a gradient (like on the login screen, or the webpage linked earlier) I can see the image moving for a couple of seconds. This kind of behavior from the screen also makes my eyes painful after a while.
I love this laptop otherwise, but this is a terrible quality issue. I tried to explain my problem to lenovo with no luck.
Anyway, from what I read here, it's common to most x220, what can I do.
If at least lenovo was helpful. Or if they could let me return the laptop without the absurd 15% restocking fee...
Edit: Alright, found by myself after a couple of hours searching: The moving bands when the display is "adjusting" to the new picture is in part due to Intel's power saving tech "Intel Display Power Saving Technology" which can be disabled in intel's control panel. It causes flickering of the screen in general, but mostly gradients.
For those wondering, yes, it does save some power. The computer idling with this feature uses 10 watts. Without it's 11. I don't know how it'll affect battery life, but if I really need longer battery life, I'll turn the brightness down myself.
I still notice some flickering, I'll see how it goes. The banding, while now static, is still clearly visible though.
Maybe someday they'll learn LG is not good at IPS screens (see the ipad2 fiasco too)

Gradient Banding in CS3

OK I've looked all over the internet, and have found no solution to this problem. I was using Illustrator CS3 and I noticed gradient banding in my project.
It's not my monitor or color profile, I've checked on several computers.
I checked in Photoshop CS3, no banding. It's an Illustrator issue only.
I'm using RGB colors, and Proof Colors is NOT on.
The tutorial I'm following is here http://www.gimpplus.com/?p=3
Here's a link to the result of the banding: http://i34.tinypic.com/par6a.jpg
I know it's subtle (because of the colors), but there's noticeable banding. I don't get why it's only Illustrator CS3 though :\

Will you be using the file in RGB or CMYK? Is the gradient banding visible on a print as well? If I click on the par6a.jpg link I see a perfect graytone gradient. Or is this not the file you uploaded?

Gradient banding is not smooth, with more halo white and dark black with poor tone

Hello
gradient banding is not smooth, with more halo white and dark black with poor gray tone

Hello, long shot, but...
Go to System Preferences > Universal Access and down in the Display: section make sure that the Enhance contrast: slider is all the way to left to Normal, or more to the right for less Contrast.
Universal Access> may be Accessibility in 10.8.x

Remove gradient banding

Hi
I'm using Photoshop CC and I am currently trying to remove some background gradient banding seen in some corporate style photographs I've taken recently. I've basically added a gradient circle of light to the black background.
When viewed on computer the gradient works perfectly - but, when viewed on a mobile phone (which these would most likely be viewed on - on apps such as linkedin etc), the banding seems to be very apparent.
I've tried various techniques such as creating a dithering layer while working in 16bit: following this guide (Photoshop Actions to fix the banding of Photoshop's gradients.):
Create a new layer (should be topmost).
Fill it with solid 50% gray.
Make some noise: Filter > Noise > Add Noise. The settings are Amount = 25%; Distribution = Uniform; Monochromatic = checked.
Now hit Command+F (Ctrl+F on Windows) to repeat the noise filter on the same layer (if you're curious why, watch the layer's histogram as you perform the noise filter the first and second time).
Set the layer to Linear Light. A great blending mode for this purpose. The darker half of the shades is implemented as inversed linear subtraction (like Linear Burn), and the lighter half as linear addition (like Linear Dodge).
In the Layers palette, set the magic values for the layer Opacity to 1% and the Fill opacity to 19%. You could (but don't, really) read the small note below about all the gory details*.
We're done. Now lock the layer (the padlock icon in the Layers palette) so it won't react to mouse input. You can forget it exists.
I've also added noise to the gradient layer to see if that seems to help - but it doesn't really.
I'd then merge all working layers together, resize to 960 x 640, convert to 8bit and save.
Any advice would be greatly appreciated.
Pictures below:
Computer Image:
Thanks,
Stephen.

Without being able to test various approaches to solving the problem before posting one here, all that is available is to work with images you posted. In both the original and in the second image (which has increased contrast that makes the banding more apparent), making a loose lasso selection of the offending area and applying a Gaussian blur eliminated the banding. Not fancy, but it worked as a final step. Perhaps it is worth a try.

Saving as flattened PNG -- gradients banding

I'm sure there's something really, really simple I'm overlooking, but this is driving me nuts! When I save FireWorks files as flattened PNG, gradients get badly banded. I am selecting PNG 24 or PNG 32 in the Options for the 'Save As' dialog, but the results are as if I'd selected .gif or maybe PNG 8 (see attached)
I had this problem in CS4, too, but after trying everythign I could think of to fix it, concluded it must be a bug in CS4, or maybe somethign wrong with my install. But now my crispy-fresh FireWorks CS5 is showing the same problem.
What am I missing? A hidden preference somewhere?

Holy makerel, that's not the answer, but it gave the clue to find it: In order for Save or Export to output the graphic at PNG32, PNG32 needs to be selected in the Optimize palette. If PNG8 is selected in the Optimize palette, exporting or saving is at PNG8, no matter what options are selected in the Export/SaveAs dialogs. If PNG32 is selected in the Optimize palette, the Save As/Export produces PNG32.
That strikes me as a bug in the Save As dialog: if the Save dialog lets me specify what depth I want to output, I expect that to, you know, be the output, not to have the output dictated by some other palettte in the application. I find it more forgivable in the Export dialog, in which there is no option to specify the bit depth.

Pixelated gradient banding problem

Hi, I've found that Photoshop CS4 has just developed a problem where gradients become pixelated and produce banding like in the image below.
This was produced by making repeated marks in the same place with a brush at 24% opacity.
I've also noticed banding in gradients.
I've been trying to research it and all of this has only just started to occur today, so I don't imagine it has anything to do with my monitor setup (particularly because of the pixelation), which is a commonly suggested answer.
This document setup was 8-bit, RGB Color mode, 72 dpi.
Thanks

Hello.
I just bought a Dell u2410 Ultrasharp verA02 and it's more like UltraBanding. At least I notice the banding much more on this monitor than on my older 19" samsung. In fact I didn't even notice the banding at all on that monitor. Tomorrow I will go back and check it again to make sure.
So are you all sure that it is not a monitor problem and more of a software / bit problem? Because when I switched my painting to 16 bit in Photoshop (CS3) I had the exact same banding problems (I was painting in RGB mode but in a range of gray values). You can see it really heavy on the grays! It's so unbelievably frustrating! Any help other than what has been offered thus far would be greatly appreciated.

Photoshop Gradient Banding Issues

I have tried the solutions I have read concerning this issue and none have worked for me. I have used Photoshop for a long time and this didn't used to happen. Why doesn't Adobe fix this issue??? I don't want to use nor should I be expected to use the noise blur solution to fix a problem that didn't used to be a problem. I have gotten by the past few months trying to in most ways design around using photoshop for blends but it is extremely frustrating. Here is what I get no matter what colors I am blending:
http://michaelsterlingdesign.com/banding.png
What is the dealio and is there a series of special settings that need to be set when using an Apple iMac that is only 1 year old? I love Adobe products but this is driving me mad.
Any help I can get will be greatly appreciated.

It is not just the gradient tool it is the paint brushes that have this problem as well.
So in essence you are telling me that Apple products can't use or display photoshop images because they aren't up to date with the latest display capabilities?
I use an iMac at home and a Mac Pro at work with the same display results.
Bit depth is the cause? 32 bit gives a smoother transition but slows the app way down. So in order to get smooth transitions using the gradient tool or the brushes I have to use 32 bit documents or change the colors in my document by adding noise to them?
Is this true?

Gradient Map in CS4

I've just installed Photoshop CS4 but the Gradient Map tool is not working for me as in CS3.
I want to change colors of black lines on a clear background ( in a CMYK document) to 100% cyan.
I have done this many times in CS3 using the Gradient Map and setting both beginning and end points to 100% C and other colors to 0%. However, now it comes out to 69%C15%M0%Y0%K.
I have not changed any defaults in the PhotoShop program. Solutions?

open the scanned file into Photoshop
1. change the doc type to CMYK
2. duplicate the layer, change the background to white
3. Apply Threshold to Layer 1 , adjust the slider to desired density, thickness of line. use Wand tool the select and delete white background.
4. Apply GradientMap (color chip 100%Kto100%K) the get Black (100%K) lines.
5. Then I lasso-select the lines I want to be Cyan and com-J to put them on a new layer and I refine the lines with erase-pencil.
6. Apply GradientMap , this time with color chip 100%Cto100%C to this new layer.
It takes much longer to explain than to do it. Except for refining (which depends on the complexity of drawing) it only takes seconds.
The GradientMap should apply a given color(s) to the lines but some setting is different in CS4 on installation and I would like to find how to set it correctly so that Gradient Map will work correctly.

Gradient banding in CS4

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