Why no lighten/darken blending modes in Lab?

With PS CS, I have noticed in Lab color space the lighten and darken blending modes for layers are disable. Also, if an RGB picture uses them, they are converted to normal blending mode upon conversion to Lab. Any idea why this limitation? And any way to circumvent it?

This is true also for the Color Dodge, Color Burn, Difference, and Exclusion blend modes in CS3. (I don't remember if all of these modes exist in CS.) The only way to circumvent the mode conversion when switching from RGB to LAB seems to be flattening beforehand---not likely to be a happy solution for you.

Similar Messages

How to calculate blend modes in Lab

When calculating blend modes in Lab mode, to which range I should convert the values of the a and b channels?

When calculating the results of the blend modes in RGB, I convert the R, G and B values to 0 - 1 range, then find the result of the blending.
In Lab, I tried to convert the values of the a and b channels to the -1 to 1 range, but I could not success.
For example, let's say I want to find the result of multiplying a layer with itself in Lab ... and the color of layer is L: 53, a: -54, b: 23.
Ps gives the result as L: 28, a: -85, b: 42.
How can we find the same result?

Why is a layer blending mode result altered by adding and effect?

I've done a search online and haven't come up with an answer but does anyone
know why a layers blending mode result is altered by adding an effect?
I am using CS3 on a PC (Windows XP SP2) and have two layers; one a Tiff and
a second a text layer with an ambient light and a spot shining on them. Both
layers have 3D turned on and accept lights and are in the same position in
space.
To make the text, which is coloured black, sit better I changed the layers
blend mode to soft light which works well.
I wanted to soften the edge of the text a little so I added a Fast Blur
effect and suddenly the result of the blend was completely different. If I
turn off the effect it goes back to what it was before but even if the Fast
Blur is set to zero, ie no blur on the layer, the blend result is altered.
Does anyone know what's going on?

Many thanks for that. I tried the Box Blur but it too shifted the result of the blend. In the end, to get this job out of the door, I changed the colour of the text to orange, lowered the opacity and used Multiply as the layer blend mode. Adding the Fast Blur effect to this didn't shift the result of the blend mode. It's not as sexy a look as using Soft Light but it works. I wonder if it's something going on with the maths or this a real bug? <[email protected]> wrote in message news:[email protected].. > Presumably a bug that uses the blur's convolution kernel when it > shoulddn't. Please report at <a href=http://www.adobe.com/go/wish>. Still, > sometimes changing the blend behavior is inevitable. Even if the layers > visually look the same, the actual pixel values may change and thus create > a different result in the blend formulas. That should not be the case > here, though. Replace the Fast Blur with Box Blur set to 8 or 9 iterations > and the result should look the same, but without the blending problem, I > guess. > > Mylenium

Question about using blending modes when cloning

Hi I want to clone on a blank layer above the background layer. I have the tool set to curent and below and the blank layer is set to normal blending mode. I want the cloning to be in darken blending mode. I change the blending mode of the clone stamp tool to darken. Will that work on a blank layer that is set to normal or is it necessary to also change the blending mode for the blank layer to darken as well? Thanks for your help.

Well thanks. It's not just a portion of the image that I want to clone on using different blend modes, but the entire image. I didn't want to duplicate the background to clone on as it adds a lot in size to the image and its harder to edit out incase I make a mistake. Guess I will have to have two layers, one set to lighten and one to darken. I wish that Adobe would make photoshop work in the next version so that you could just change the blending mode of the clone stamp tool in the tool bar. Wasn't it like this in versions before CS5?
So I have another question for you. Can I use the healing brush on lighten and darken blending modes on a blank layer set to normal with sample current and below selected? Or do I have to switch between two separate layers, one set to lighten, one set to darken?
Thanks again.

Problem with Lighten/Darken Merge

I'm having a problem with the Lighten and Darken blend modes in CS6. Once I merge the layer it gets these weird bands. It is fine until I merge the layers together or export. See pictures:
I have tried different combinations of pictures and have reset Photoshop's settings. I've never have this problem before.
Thank you,
Benjamin

Figured out it's an issue with the lens profile corrections in both Lightroom and Camera Raw. More specifically, distortion correction.
Banding in Photoshop when using blend mode of lighten or darken, and ACR & or Lr
Banding pattern when using profile corrections in Camera Raw and Lightroom
Benjamin

Blending Mode Inside Composition

I have CS4 AE. I imported a layered PSD file which brought in all my layers, in addition to automatically making a composition out of all the layer groups. So far so good. However, why is my multiply blend mode on one of the many layers not honored when inside of these group layer compositions? When I open up the composition itself with all the individual layers, the multiply blend mode is indeed assigned.
If I put into the timeline just the individual layer with the multiply, it works. It doesn't when inside of those automatic group layer comps.
Can anyone shed some light?
Thanks!

>However, why is my multiply blend mode on one of the many layers not
>honored when inside of these group layer compositions?
Because AE is not Photoshop! Just like Andrew said, you need to tell AE to pass through blending modes. The principle is simply reversed - in AE you turn this off when you tweak the group blend properties, in AE you need to explicitly turn it on.
Mylenium

Blending Modes-where are blending modes Darken and Lighten?

I understand that 2 new blending modes should come with PS CS3, darken and lighten. However, these do not appear in my blending mode panel. Can anyone tell me why?

Charles and Buko, You know, sometimes a guy just doesn't function correctly and I think this is one of those times. guys, with red face, and his tail stuck between his a** I am afraid i have wasted everyone's time here. Charles you are right on dude, there they are, the two evil ones, missing in action because I was looking for them in the wrong place. I'd like to place blame on the CS3 video workshop series which showed them under the luminosity, but that would be lame. I am at fault.
But it is nice to know that so many are so ready to help.
I apologize to everyone and thanks for all your help.

Why is the refresh rate slower in lab mode? photoshop cc 2014

hi
why is the refresh rate slower in lab mode?
for example i load an image , rgb , ad an adjustament layer -> curve and i start to play with curve -> the refresh is instantaneous (i mean the image become more dark or lighter instantaneous )
but if i load an image -> conver in lab mode , the refresh rate is slower
i tried cs6 too, same behavior
ps how can i have an email to notify me that someone answer to this discussion?
thanks

hi
there is nobody can check it?
under windows 7 or 8
thanks

Why isn't it letting me apply blending modes to 3D objects?

Hello, I have had a problem with After Effects, it is not letting me use blending modes on 3D layers? Any Help? Here is the video I am following After Effects Tutorial - Create 3D Text onto live action Footage HD - YouTube

Blending modes are not one of the features that you can use with the ray-traced 3D renderer.
The list of limitations of the ray-traced 3D renderer appears when you first switch a composition to use the ray-traced 3D renderer.
Details:
After Effects Help | Extruding text and shape layers

Blending Mode..

if painting on a layer with a white brush set to 'overlay' mode, then it lightens the colors that are being painted over.
Is there a brush mode other than overlay, that will:
-if painting over colors that have a value of 50%-100% lightness, then it will lighten the color (much like overlay)
-but also, if painting over colors that have a value of 0% - 50% then it will darken the color?
I would imagine that I may need to paint with a brush with a 50% gray color (#808080) instead of a white brush to acheive this... hope this makes sense

thanks , i will try both these methods. Swithcing to black when painting over dark areas and then switching to white when painting over light areas solves it so long as the layer is on overlay,, but i was looking for a way to do this with some sort of other blend mode or option that would do this automatically. I dont know why but I had thought that using a 50% gray color for the brush would be a starting point.. was just a guess though.
I'll try the curves method too, thanks

Figuring out Blend Modes .. ArgH!

I've read numerous tutorials and books on the subject of blending modes and the one thing that bothers me is understanding how they work with color to the point that I understand and can remember forever, without having to always toggle though all the blending modes to find the right one when I'm working. I'm hoping someone / some where can explain it in a way that can be understood where as, when I'm working I can just select the specific blending mode I want without toggling though most of them ?

StrongBeaver,
Be easy on yourself. Start by understanding one single (but representative) blend mode. That will give you the concept for other blend modes. The MULTIPLY blend is a great starter. Understand it and you're on your way. Below is a cat-and-dog-language explanation of it.
First, just what is being multiplied? It is basically color intensity (called color value).When rabbits multiply they INCREASE in number. Yet, when color values multiply, they DECREASE in value. Counterintuitive or a misnomer? Not if you realize that FRACTIONS are being multiplied.
Color value is popularly described on a 0-255 scale, with 255 being the maximum value---limited by the eye's capacity. In blending algorithms, the intensity scale is "normalized", as they say, to 0-1. Thus, 255 becomes 1, 192 becomes 3/4, 128 becomes 1/2, etc.
If you have a red pixel of value 128 and multiply it by itself, you get 128/255 x 128/255 = 1/2 x 1/2 = 1/4. Since we like to verbalize color values on the 0-255 scale, 1/4 translates back to a value of 64.
I mentioned a "red" pixel above. But each pixel has THREE associated color values (red, green,blue). The multiplication takes place separately and independently in each of these color "channels". When two layers are multiplied, the red value at a given pixel site in one layer is multiplied by the red value at the same site in the other layer. Ditto for blue and green.
Saying that "two layers" multiply is not wrong, but it is too restrictive. Only the upper layer is put in the multiply mode. The pixels in that layer multiply with WHATEVER NET color value is visible BENEATH it. That could be another single layer or it could be a conglomerate of layers blending or otherwise interacting with each other.
More generally, then, one should say the upper layer blends with the substrate. It doesn't blend with anything above it unless that is called for by the above layers, Further, one can assign a blend mode to a paint brush, If Multiply is assigned, the color value painted on the layer multiplies with the existing color, again independently at each site and in each channel,
It should now be clear why Multiply darkens, The color value in each channel resulting from multiplication is always less than either inputs, except if one of the inputs is maximum, in which case the resulting color value is the same as the other channel value because that other value has been multiplied by 1.
The physical parallel to multiplying is a pair of filters, The first filter reduces white light incident upon it, passing a fraction on through which, in turn, is incident upon a second filter which passes along a fraction of the fraction.
You should next look at the "Screen" blend mode because it is so similar to the Multipl;y mode but produces the opposite result (lightens). In screening, the INVERSE* color channel values are what get multiplied, and the inverse of that multiplication gives the resulting color value. The resulting channel value is always greater than that channel's input values (unless one of the inputs is 0 for which the resulting color value is that of the other input).
*In case the meaning of "inverse" eludes you, the inverse of a fraction (f) is 1-f. For example, the inverse of 1/4 is 3/4, and the inverse of 1/2 is 1/2. These inverses multiply out to 3/8. The resulting color value of 5/8 (the inverse of 3/8) is greater than either input (1/4 and 1/2), i.e. it's lighter.
Hey! that's two blend modes down. Or really three because the Normal mode is clear. Only 22 modes to go!

How to change blending mode on multiple layers at the same time

I'm using CS5. I have a document with about 70 layers. I would like to change the blending mode to "lighten" for each layer. Is there an easy way to do this?

Photoshop doesn't allow multiple layer editing. That's why the styles are grayed out. Only 1 layer at a time.
What version are you talking about?
CS5 definitely let’s one apply a Style to multiple Layers.
rfcommagere, I don’t know how to make it much clearer:
• set the Blending Mode on one Layer
• with that Layer selected create a Style with »Include Layer Blending Options« checked
• select all other Layers that should have that Blending Mode
• click the Style in the Styles Panel

Are FW blending modes preserved

I have a colored gradient bitmap image in "heat" mode over a
neutral black/gray image with white highlights, the latter of which
I want to stand out. In FW it looks great... Can I export these to
FL and expect the blending modes to remain intact?

Paevo Kelley wrote:
> I have a colored gradient bitmap image in "heat" mode
over a neutral
> black/gray image with white highlights, the latter of
which I want to stand
> out. In FW it looks great... Can I export these to FL
and expect the blending
> modes to remain intact?
>
I'm not sure about CS3, but as of Flash 8, these FW blend
modes were
supported:
Darken
Multiply
Lighten
Screen
Overlay
Hard light
Add
Subtract
Difference
Invert
Erase
I didn't hear much about the blend modes when CS3 came out,
so chances
are they are still the same. You can quickly check by Opening
Flash and
seeing if the mode you want is there. Generally, if the blend
modes
exists, it should work. Another option is to create a
flattened copy of
the blended image.
Jim Babbage - .:Community MX:. & .:Adobe Community
Expert:.
http://www.communityMX.com/
CommunityMX - Free Resources:
http://www.communitymx.com/free.cfm
.:Adobe Community Expert for Fireworks:.
Adobe Community Expert
http://tinyurl.com/2a7dyp
See my work on Flickr
http://www.flickr.com/photos/jim_babbage/

Separate blend mode for each clone source

If each clone source could have it's own blend mode (not to mention its own opacity and hardness) setting it would be more effective. The current blend mode setting in the clone source affects the preview only.
I often have to jump back and forth between Normal, Lighten, and Darken modes, and would like the convenience of clicking between sources already set to what I want.
Thanks

What goes on in the new "Clone Source Panel" is unrelated to Tool Presets oddly. It would be possible, to optionally allow recording of the settings in the Panel, as part of the Clone Tool Presets. But they never bothered to do it. Its as if this feature was designed with no understanding of the importance of Tool Presets at all. This would solve your problem.
The shortcut for Lighten Darken and Normal are Alt > Shift > G, K and N, respectively. This may speed up your work.

Blend Mode doesn't hold in Smart Object

Here's the scenario:
I'm building a web page, lot's of layers and groups. I want to clean things up by converting some groups into smart objects.
Here's the Problem:
Within some of the group folders are layers with a blend mode assigned, like Darken. When I convert the group to a Smart Object the blend mode on those layers doesn't hold.
Screen grabs:
Hopefully these will make it clear in cas I haven't explained it well.
Original with layers
Group converted to Smart Object
Bland mode applied to Smart Object
I figured out why it happens, I want to know if there's a way around it other then don't do it.
TIA,
Mike

Yep, another understandable feature by few who understand, but created by many users - toy feature for web and print. It can either mean money or murder when handed these files from your bone head customer who assumes anything that can be created shall work with the greatest of ease because marketing told you so.
Now that's progress intelligently planned.
sweet~!

Why no lighten/darken blending modes in Lab?

Similar Messages

Maybe you are looking for