Garbage Matte Layer Mask?

Somebody just helped me in doing a chroma key on lab mode playing with a and b values (I got all that) and at the end he added "if necessary add a garbage matte layer mask" I have no idea what he meant, tried to find out thru all the icons but nothing has that name .... can somebody help me out how to do that?
I am not an expert on photoshop but can follow steps and figure things out quick. Thanks for your help

O E,
That person was stretching the term Garbage Matte a bit. As Mike says, borrowed from film/video. The purpose is the same - to mask out unwanted image area from the subject.
Again, as Mike points out, a Layer Mask is attached to its Layer and does the same thing, though with much more accuracy that a normal "Garbage Matte" in any NLE application. I doubt that you'll find Garbage Matte in any PS Help file, the manual, or probably any book on PS, unless maybe it'd be in PS CS3 Extended, as it does more video work.
After Layers, and just a little ahead of Adjustment Layers (IMO), Layer Masks are the most powerful tool in PS. How did I ever live without them back in the Dark Ages?
Hunt

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Garbage Matte Not Masking?

I must be doing something stupid because this should really work according the manual:
1. Video 1 has an AVI file.
2. Video 2 has a PSD file created in Photoshop.
3. I drag the 4-point Garbage Matt Key effect to the PSD clip.
4, I use my mouse to drag each of the corner control points so that it bounds a small rectangle on the PSD. I can clearly see the control points and the bounding lines have correctly selected the desired shape.
5. However, nothing is being masked. The entire PSD, including the area outside of the 4 points remains visible over the clip on Video 1.
What am I doing wrong?
Thanks!

PSD:
Type: Photoshop
File Size: 4.0 MB
Image Size: 720 x 480
Pixel Depth: 32
Pixel Aspect Ratio: 1.0 (1.2121)
Sequence:
Sequence 01
720 x 480
00;00;24;21, 29.97 fps
48000 Hz - Stereo
[fx] indicator is visible
Other effects (e.g. opacity and motion) work fine on the PSD.
Running PPro CS4.1.0
Mac Pro running OSX 10.5.7
2 x Dual Core 2.66 GHz
13GB RAM
Radeon X1900 512MB VRAM
Glad to know it is working fine on others machines. Here is a screen shot. The greyish clip in the background is Video 1. The brownish clip, Video 2, which I scaled down so you can see it on top of Video 1 is visible in its entirety, The bright area of the marqee is surrounded by the 4-point matte.
Thanks for the help.

PS CC (since JAN 2014 update) Layer-mask editing causes hangs/crashes

ONLY since JAN 2014 update, PS CC has been hanging/crashing when I paint/edit a layer mask. All may be well at first (or not), but suddenly the display of the mask (or mask overlay on the layer itself, as shown when hitting backslash key) is not shown in full but renders in s-l-o-w-l-y in rectilinear pieces <snapshot below was taken before video card upgraded but is still typical of what I mean>. When I view Windows' Task Manager for PS, I see my CPUs are each working at their upper limits (up to 80+-90+%), varying only by a few points, over a VERY long time... which could be MANY minutes. OR the System has decided PS is Not Responding.
In any case, whenever this happens, it means in all practicality PS CC is not working, so I either kill it or it's crashed.
Now, here's the thing: that VERY file, can immediately be opened in PS CS6 (which I have fortunately kept installed on my computer), and the mask will be as I thought it should be, and I can edit it as I always could, just fine! So it's obviously a PS CC thing, and I do NOT recall this happening prior to the JAN update. It is still a problem after the two subsequent updates.
I have not been able to determine the specific instances when this happens, as it seems to happen whenever I am editing a mask, no matter what size/softness/color brush, what magnification, what view mode, many or few layers, big or small file, etc.
I did upgrade my NVIDIA card (from GeForce GTX 260 [with current driver] to GTX660), just in case it was a factor (maybe kept it from crashing as fast? hard to tell... but it's still an unworkable problem). You can see from my Sys Info shown here from the PS CC Help menu that it should be more than sufficient for any PS CC task, and it's running the latest driver:
Adobe Photoshop Version: 14.2.1 (14.2.1 20140207.r.570 2014/02/07:23:00:00) x64
Operating System: Windows 7 64-bit
Version: 6.1 Service Pack 1
System architecture: Intel CPU Family:6, Model:14, Stepping:5 with MMX, SSE Integer, SSE FP, SSE2, SSE3, SSE4.1, SSE4.2
Physical processor count: 4
Processor speed: 2664 MHz
Built-in memory: 16379 MB
Free memory: 12453 MB
Memory available to Photoshop: 14697 MB
Memory used by Photoshop: 60 %
Image tile size: 1024K
Image cache levels: 4
Font Preview: Medium
TextComposer: Latin
Display: 1
Display Bounds: top=0, left=0, bottom=1200, right=1920
OpenGL Drawing: Enabled.
OpenGL Allow Old GPUs: Not Detected.
OpenGL Drawing Mode: Advanced
OpenGL Allow Normal Mode: True.
OpenGL Allow Advanced Mode: True.
AIFCoreInitialized=1
AIFOGLInitialized=1
OGLContextCreated=1
NumGPUs=1
gpu[0].OGLVersion="3.0"
gpu[0].MemoryMB=2048
gpu[0].RectTextureSize=16384
gpu[0].Renderer="GeForce GTX 660/PCIe/SSE2"
gpu[0].RendererID=4544
gpu[0].Vendor="NVIDIA Corporation"
gpu[0].VendorID=4318
gpu[0].HasNPOTSupport=1
gpu[0].DriverVersion="9.18.13.3221"
gpu[0].Driver="nvd3dumx.dll,nvwgf2umx.dll,nvwgf2umx.dll,nvd3dum,nvwgf2um,nvwgf2um"
gpu[0].DriverDate="20131219000000.000000-000"
gpu[0].CompileProgramGLSL=1
gpu[0].TestFrameBuffer=1
gpu[0].OCLPresent=1
gpu[0].OCLVersion="1.1"
gpu[0].CUDASupported=1
gpu[0].CUDAVersion="6.0.1"
gpu[0].OCLBandwidth=1.16816e+011
gpu[0].glGetString[GL_SHADING_LANGUAGE_VERSION]="4.40 NVIDIA via Cg compiler"
gpu[0].glGetProgramivARB[GL_FRAGMENT_PROGRAM_ARB][GL_MAX_PROGRAM_INSTRUCTIONS_ARB]=[16384]
gpu[0].glGetIntegerv[GL_MAX_TEXTURE_UNITS]=[4]
gpu[0].glGetIntegerv[GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS]=[192]
gpu[0].glGetIntegerv[GL_MAX_VERTEX_TEXTURE_IMAGE_UNITS]=[32]
gpu[0].glGetIntegerv[GL_MAX_TEXTURE_IMAGE_UNITS]=[32]
gpu[0].glGetIntegerv[GL_MAX_DRAW_BUFFERS]=[8]
gpu[0].glGetIntegerv[GL_MAX_VERTEX_UNIFORM_COMPONENTS]=[4096]
gpu[0].glGetIntegerv[GL_MAX_FRAGMENT_UNIFORM_COMPONENTS]=[2048]
gpu[0].glGetIntegerv[GL_MAX_VARYING_FLOATS]=[124]
gpu[0].glGetIntegerv[GL_MAX_VERTEX_ATTRIBS]=[16]
gpu[0].extension[AIF::OGL::GL_ARB_VERTEX_PROGRAM]=1
gpu[0].extension[AIF::OGL::GL_ARB_FRAGMENT_PROGRAM]=1
gpu[0].extension[AIF::OGL::GL_ARB_VERTEX_SHADER]=1
gpu[0].extension[AIF::OGL::GL_ARB_FRAGMENT_SHADER]=1
gpu[0].extension[AIF::OGL::GL_EXT_FRAMEBUFFER_OBJECT]=1
gpu[0].extension[AIF::OGL::GL_ARB_TEXTURE_RECTANGLE]=1
gpu[0].extension[AIF::OGL::GL_ARB_TEXTURE_FLOAT]
I work on digital-photography files, and use a layer mask in almost every file, so this relatively-recent bug is a big PITA, having to switch back and forth between CS6 and CC!
Until there's a fix... is there a way to roll-back my PS CC version to BEFORE the JAN 15, 2014 update?

I am not qualified to comment on technical issues; I'm just a user whose son in IT is my 'technical support department.' (But he's not much of a PS user.)
I'm pretty sure, however, that all my Prefs were set to the same things BEFORE the Jan 16, 2014 PS CC update as after (unless the update itself changed something I was unaware of... the settings APPEARED to be the same but I can't easily locate my notes of what my Prefs were from long ago).
And they were the same as the PS CS6 I have had installed on this same system for a very long time, with older video card with older driver, with newer driver; newer video card with newest driver, etc. Yet after that CC update, CC has not (until this workaround) worked re 'the masking bug' for me, yet CS6 has always worked just the same.
So I conclude that the only variable (other than the video card upgrade I did in an attempt to solve this and of course those Windows auto-updates) in this scenario IS something to do with PS *CC*, and after Jan 16, 2014.
As for restarting the machine vs. restarting PS, well, PS is the major player of my system, so when I shut that (and LR) down, I might as well 'clean things up' by Restarting. BTW, I am in the habit of closing and reopening PS (CC or CS6) whenever I finish with a file and load another, in order to get back some of that memory which PS never seems to want to let go. (This is not new to the latest versions, I think. My son says it's a 'memory hog'? ;-) ) I track its memory use in Windows' Task Manager and find that seems to let it 'refresh' itself. (See, I told you I'm not a technical person. ;-) ) But I do not think this has anything to do with the bug. Just a quirk of PS. Like when a tool goes all wonky (for example, its little icon becomes just a 'plus' sign even though the tool is still performing correctly, it's telling me, I think, that it would like to be restarted. And that makes it feel all better... I mean, tool icon reappears.)
Anyway... it's up to Adobe to figure out IF and what may be wrong with PS CC -- it still doesn't work for me as I had it configured at first, and I think it should, right? -- and to fix that... PLEASE. SOON.

Problem with garbage Matte 8-point

I filmed a video in one go and did not touch the camera at all. I split the clip and then put one on top of the other to use the eight-point garbage matte effect. The problem is the two clips don't match. There's a small difference in colour and it doesn't look like the two clips are aligned with each other.
timeline:
ps I am very new to Premiere Pro.
Help is very much appreciated. Thank you.

I have been putting a feature request for that for many cycles now.
But our prayers have been answered.
In CC next: masking and tracking for all effect incl feathering.
Check out first feature.
http://www.retooled.net/?cat=6

In RGB mode, why does pasting 50% gray into a layer mask actually put K 59% in the mask?

Create a new (small) document in RBG mode, 8 bit, transparent background.
Fill the resulting Layer 1 with 50% gray, 100% opacity. The eyedropper reports RGB=(128,128,128).
Copy the layer to the clipboard.
Create a new Layer 2. Fill it with Green #00ff00 (the contents don't actually matter here).
Add a layer mask to Layer 2.
Bring that mask up for editing.
Paste in the contents of the clipboard. The eyedropper reports the contents of the mask as K 59%.
I was expecting 50% gray (or K 50%). Why did I get K 59%?
Addenda:
I'm using CS3 on a Mac. I haven't had a chance to see if the same thing happens with more current versions of PS.
Apply the layer mask in Layer 2. Extract the transparency to a new layer. The eyedropper gives the RGB of the
new layer as (106,106,106), with variations pixel by pixel of plus/minus 1.
Take the Difference between that new layer and Layer 1; the eyedropper gives the RGB of the difference as (22,22,22),
again with variations of plus/minus 1.
Paste the contents of the clipboard into a new layer. The eyedropper gives the RGB contents of that new
layer as (128,128,128), both without and with a Black & White adjustment applied.
Create a new layer, add a layer mask, fill the mask with 50% gray. The eyedropper gives the contents of
the new mask as (128,128,128) (now as expected).
The 50% gray used above is just for simplicity. I'm actually interested in inserting a complicated RGB
image containing only shades of gray into the layer mask. This example indicates that pasting won't
preserve the gray levels. Indeed, when I replace the initial 50% gray with a Black to White gradient,
the differences between the initial gradient and the one in the mask range roughly quadratically from 0 at 0,
22 at 128, and 0 at 255.

Thanks. First doing Edit > Color Settings, Gray > Gray Gamma 2.2 resulted in putting 50% gray in the layer mask.
Does changing the Gray setting have any effect on channel calculations, via Image > Calculations?
Or what you get from
Image > Apply Image, Channel > Transparency ?
I don't see "sGray" listed among the options for Gray in the Color Settings. Is it somewhere else?

Photoshop TIFFs with layer masks do not display correctly

I am sure other people must have this problem, but I cannot find any related posts so here goes:
I open an image using the "open in external editor" command (typically a RAW file converted to a TIFF), edit in Photoshop and save the file (as a TIFF, I do not use PSD format)
If the PS edit contains any layer masks or alpha channels (masks in the channel pallet) it does not display correctly when it reappears in Aperture. Only the top most mask will display, assuming I have multiple layer masks in the PS edit.
Not only will the TIFF only appear as the mask in Aperture, but Aperture will print or email the mask, not the PS edited file as it should appear.
It seems that Aperture only recognizes the layer mask (or alpha channel mask) as the image, and all the other layers etc are disregarded.
Is this a confirmed bug, or is there some setting I have not correctly configured or some other issue?
I love Aperture, but this problem is nearly a deal-breaker for my workflow, and would be for any serious photoshop user, I would imagine!
I cannot believe this is still a problem in version 1.5, which is the version I am using (thus my system is 10.4.8)

David,
I assume you mean in the edited PS TIFF file:
In different cases I have either:
A. A TIFF file with layer a layer mask
B. A TIFF file with multiple layer masks
C. A TIFF file with an alpha channel mask
D. A TIFF file with multiple alpha channel masks
E. A TIFF file with any combination of the above
the outcome is the same, they all do not display correctly in Aperture. It does not seem to matter if the file was opened in PS from Aperture via the open with external editor command or if it was worked on outside Aperture entirely then imported. I do have maximize compatibility in PS checked (though I understand this is only for PSD files, though perhaps I am wrong here)
any thoughts?

Advice when using lots of Adjustment Layers/Layer Masks

I want to create an image that will be composed of lots of layer masks that I am going to use to paint different effects back over someone's face. I currently have a hue/saturation adjustment layer that I used to desaturate the image and then I selectively painted that desaturated layer back over the skin of someone, I also want to add some green so I created a color balance layer and made a layer mask out of it and want to selectively paint back some green to the skin tone.
1. Does it matter in the layer stacking order where these adjustment layers/layer masks reside?
2. Any general tips for working with an image with lots of adjustment layers/layer masks?
Thanks.

Depending upon the blend mode, it does matter what order you put the layers, as the topmost layer will affect what's below it. You can play around with the different postions and see what works best for your image. You can also group the layers, and set the blend mode of the group to anything other than "Pass Through", so that the adjustment layers only affect what's in the group.

Layer mask with background animation

Hi all,
I am looking to create a video for my YouTube channel using Layer Mask but I am not too competent in using masks.
The logo for my channel is here:
I would like to create a moving background in where the coloured image is but I want to mask out the white areas and keep the text on top. Is it as simple as just creating a hexagonal layer mask with the text in a separate layer?
Thanks in advance,
M

Another way is to use a track matte.

Layer Masks Aren't Working Properly

I frequently use layer masks in my work and have never had any problems with them. However, for the last few days, something weird has been happening.
I have used a large soft brush at 20% flow and 100% opacity and things seem to work until I look closely. No matter how many times I go over an area with the brush, there is still about 30% of the image showing (it's translucent). I have also tried to make a selection on the layer mask and fill it with black and it appears as if I only filled it with 60% black. I can fill it repeatedly with black with no change at all. The only way to over come this is to apply my layer mask to the layer and then erase what I don't want, which defeats the purpose of what I'm trying to do.
I tried searching for some kind of setting that I may have inadvertently changed. Any ideas? This is driving me crazy!
Photoshop CS3 (part of design suite)
MacBook Pro 2.4 GHz, 2GB 667 MHz DDR2 SDRAM,

Reset your prefs or reset the brush tool.

Photoshop Generator: Unbound Layer Mask do not render correctly

I'm a huge fan of the Generator feature in Photoshop CC. However, there seems to be a problem with layer masks: If you unbound the layer mask from it's content layer, the generated images will not match the actual image. It seems, that the layer mask is positioned in different way.
Correct
Incorrect
Full Image
Layers
(no difference between bound & unboucn layer mask)
Is this the expected behaviour?
I'm using the latest Photoshop (14.2.1 x64 on OSX 10 Mavericks)

David,
I assume you mean in the edited PS TIFF file:
In different cases I have either:
A. A TIFF file with layer a layer mask
B. A TIFF file with multiple layer masks
C. A TIFF file with an alpha channel mask
D. A TIFF file with multiple alpha channel masks
E. A TIFF file with any combination of the above
the outcome is the same, they all do not display correctly in Aperture. It does not seem to matter if the file was opened in PS from Aperture via the open with external editor command or if it was worked on outside Aperture entirely then imported. I do have maximize compatibility in PS checked (though I understand this is only for PSD files, though perhaps I am wrong here)
any thoughts?

Keylight pre-comp not respecting garbage mattes?

Hi all!
I'm using a keying method I saw on an old tutorial from Aaron Rabinowitz and Andrew Kramer. With it, you use many copies of the Color Key effect to get a noisy rough key. Then use Simple Matte with a negative value to get a tight green halo around your subject.
Then you use your high-end keyer (like Keylight) to only key the halo out. It gives better results than trying to build multiple keys to get rid of dark areas or uneven lighting in the entire scene.
In this example, I've drawn a couple garbage mattes to get rid of large sections of the scene. I then do the Color Key and Simple Matte trick. Then all that is precomped. In my new comp, the only effect is Keylight. However, when I switch over to Screen Matte view, I still see the objects I masked out.
Theoretically, those objects shouldn't even exist in the render pipeline if they are removed in a precomp, right? Any idea what's going on?

I'm still having the same confusion. Maybe this image will help.
If I pre-rendered the precomp with the super tight green border, there's no way Keylight would ever see source footage, so why does it here?

Creating a layer mask that doesn't move

Hi, I'm just starting to learn how to use After Effects. I'm trying to apply a mask to a layer. I figured out that right clicking on the layer and going to Mask > New Mask adds a mask. My problem however is that the the layer I want the mask to mask moves but I want the mask to stay still. How do I go about doing this? Thanks in advance for any help.

Masks are on layers. Perhaps what you're looking for is a track matte. A track matte is a layer that defines transparency for an underlying layer. If you move the underlying layer, the track matte layer doesn't move with it (unless you explicitly connect them with parenting or something like that).

Gradient tool to show hide not work in layer masks

I have a PS CC (201410204.r.310X640 subscription.   When I used CS5 I could use the gradient tool (black and white) to show hide content in a layer mask. This achieved the correct smoothness I want to achieve. In CC the tool does not work in layer masks -it removes too much or the reverse, etc. I have no control at all over what is removed and not.   Is there a fix for this please.   The lack of the gradient tool for this effect is making CC not worth using at the mo to be honest and I am just about to give up on it.
Many thanks for any help you can offer.
Susan

Thank you for the replies and I apologise for havingn taken so long but have been busy with one thing and another for a few days.
How to explain?   What I mean is that if I have an image and I, say, then, for example, add a texture image, I could then add a layer mask to the texture lay and working in the lay mark remove or replace the texture mask as I wished... in CS5 I usually used the diamond gradient in little tiny strokes, if necessary, and this removed the texture in with a nice smooth gradient - or replaced it, depending on whether I was using black or white
Now it does not matter how I use the gradient tool, each 'stroke' just moves the exposed part to a different place in the image
and no matter whether the colur is set to black or white, each 'stroke' moves the exposed part to another place in the image.
In order to replace the texture, I have to use the paint brush tool.
I hope all this makes sense to you clever folks.   I have not reset preferences and tools but it has made no difference.
Also, I apparently have PS versiib 2014. 2.2 Release   20141204.r30 x 64   - I have updated several times but do not know if this is the correct version.   Any ideas gratefully received.
Many thanks. Susan

Residual hard edges with garbage mattes (v. 5 to 6)

Hello,
Thanks in advance! (I've searched for the answer and found nothing.)
I have a short film, edited in FCP 5, and I've used garbage mattes all over it. I brought it to a production house in order to create some Digibeta exhibition copies, and when exporting (they are using FCP 6), I noticed the garbage mattes (both 8-point and 4-point) had hard edges on them (although they are all feathered edges in the file). I am very experienced with mattes, and have used them extensively, but have never come across this before. I can't see any of these hard edges on my home system, although I use a large monitor. They also do not show up on the burned dvds I've made, nor when I projected them on to a 9 foot screen recently.
Is there something happening in the conversion from 5 to 6 that could be causing this? The frustrating thing is that I am trying to fix something I cannot actually see at home (and working on it at the production house is ludicrously expensive.) Could it be something they are doing? I need to resolve this soon, as the film is having a premiere in 3 weeks and the festival needs the digibeta!
Please help, and thank you again so much for your time!
Greg

Something similar is happening with me. I'm using soft edge mattes and dissolving between them on V2. During the dissolve, you can see the edge, even though the edge is masked and feathered on the shot. There are no key frames added. This happens more frequently when I have repositioned the shot. I've tried to re-render all the dissolves and the same thing keeps happening.

Garbage matte not working!!!

I am having this problem where the lines and bounding boxes around a matte 4,8 or 16 point do not actually line up with the edge of the matte, making it virtually impossible to get the matte to the proper place. Furthermore in many cases the video will vanish completely when a matte is added unless the matte positions are left unchanged...
long story short, this severely limits what i can do with my projects!!!

>i just tried your suggestion of applying the matte to a duplicate layer
Not what I tried to explain.
New example:
Video layer 3: Copy of the clip (or background), NO garbage matte applied here.
Video layer 2: The clip with the garbage matte applied
Video layer 1: Background
Click on clip in Video layer 2, and then click on the garbage matte effect in "Video Effects".
Now do the adjustments to the garbage matte.
Deselect the garbage matte effect in "Video Effects" and remove (or click the eye-ball) in Video layer 3.
This (the above) works quite fine for me.
Your other problem I have never seen, but you should see if you somehow have managed to get keyframes when you have moved the still around when placing it to where you wanted it.
Some people have said that the garbage matte bug has been fixed in CS4.
Dag

Garbage Matte Layer Mask?

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