Photoshop :: Why Different File Size Of PNG-24 / Layer Mask Versus Deleting Pixels
May 24, 2012
I have noticed in Photoshop CS5.1 and CS6 strange behaviour when saving for web file as PNG-24.
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case1.I have one layer photo 260x360.Create Marquee square 200x200 and layer mask hide selection (effect: transparent square hole inside)save for web as PNG-24 (transparency on)-> file size 131.4k
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case2.I have one layer photo 260x360.Create Marquee square 200x200 and delete pixels (effect: transparent square hole inside)save for web as PNG-24 (transparency on)-> file size 66.93k
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Both pictures got same square transparent hole, but sizes are so different. Using mask do not reduce size of the file PNG24. Why is like that, bug ?
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Jul 2, 2012
how do i stop the deleting of pixels that extend outside the canvas size when I merge a group?
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Apr 14, 2009
I could have sworn that in previous versions of Photoshop, before version CS4, that if there was a link icon between the layer thumbnail and the layer mask on that same layer, if you move one or the other, they both move. In CS4, how do you move the layer pixels and the layer mask at the same time so that they stay lined up?
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Jun 28, 2013
I am making selections of models off of a white background. I use the quick select tool and refine to make a clean selection. I go in and use the clone tool to remove the "halo" that is still there to make a super clean selection with no light bleed on the model. I put a black layer underneath to make sure that I got all of the remnants. I save the selection and turn it into a channel. I apply the layer mask and everything looks good. I flatten the image and put it on a white background (this is the desired form of delivery for client) Image saved and closed. When reopened, I make a selection using the channel and there is a distinct halo effect still present. I have tried making the selection and going over it a couple times with the brush at 100% and it works a little bit, but not entirely. I have already spent a lot of time going through cloning things out so it looks good, delivering the images, then they are sent back because of the halo.
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Apr 14, 2012
I am a novice in Photoshop Windows platform. there are 2 ways of accomplishing the following task using Clipping mask and Vector mask.
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Mar 18, 2013
I'm adjusting a photographic image and am using both a filter effect and a layer style in the same layer on a Smart Object. I want to separate the two effects into two layers, so one layer has the filter effect (Nik) and one layer has the layer style (Color Overlay) (with the goal of merging/rasterizing the Nik filter effect with the Smart Object but keeping the layer style unmerged). I can make two layers and move one effect without problem, but the visual result of each effect on a separate layer is quite different from having both effects in the same layer.  The Blend Mode for all my layers is Normal. Within the Color Overlay panel, the blend mode is Linear Burn.
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 Layer 1: a layer style and a filter effect, stacked
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looks very different from....
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Layer 2:Â a layer style
Layer 1:Â a filter effect
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Mar 5, 2011
I've been using GIMP to make GIFS for a long time now, but recently the "optimize for difference" option I've used is having the reverse effect it should have- ie, it's making the file larger. Here's an example. It's the exact same image, same dimensions, same amount of colors. The first one is unoptimized, each frame is a full picture, and it's file size it ~149kb. The second one is the same as the first, except optimized with about ~50% of the pixels removed from each frame (except the first frame obviously), and yet it's file size is ~155kb. I can not for the life of me figure out why an image with most of it's pixels removed is creating a larger file size. [URL]...
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Feb 5, 2013
I have several layers in an image, and I need to align them precisely. The ordinary layer shift ("move pixels") by multiples of pixels is not sufficient. Is there a tool or plugin for PDN that allows sub-pixel shifts (i.e. moves by fractions of pixel)? And rotations by very small angles?
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Nov 14, 2013
what does it mean when someone says a block is created on layer 0 vs a regular layer?
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Jul 30, 2012
When I drag a layer mask to the trash, it applies the mask instead of deleting it, removing all masked out pixels. I don't believe this was the case before CS6. Is there a way to adjust this setting and make it simply delete the mask?
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Right-clicking still gives me the option to delete the mask properly.
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Nov 2, 2008
How do I do this in CS4?
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Apr 26, 2009
My subject line pretty much sums up what I want to ask.
The thing is I've learned how to do both of them, but every textbook exercise I've done regarding one I found out that I can pull off with the other too.
Are they simply two different mechanisms for doing the same thing?
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Jun 8, 2012
What is the difference between the outcome of using the new content aware scale versus just going ahead and resizing the image? Or is this a matter of preference?
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Aug 27, 2011
When would you use squared and non squared pixels?
If my understanding is correct non squared are used predominantly for wide screen.
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Jan 27, 2013
Level: Newbie  OS: Win7 64bit  Ia: Cs6
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Once I use a Clipping Mask on a layer is the entire document covered in a mask?
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And/or is all the artwork from then on inside the mask?
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I've read about how to add and how to remove art from a mask. I've read about how to make and release and lots of other things.
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So, then I went and found a lesson that contained the use of a Clipping Mask.
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I am suppose to Select the main shape and "just" copy it and move it down (doesn't say rather to Paste in front or back but I assumed in back ~ not that it has mattered thus far)
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However, while making the main shape I used Gradient Mesh and used an Offset to create a "replica" and so when I go to Select the main shape the mesh is selected and so when I Paste (in back ~ seems most logical) and then move it down the details such as the colors of the Gradient and other such things are visible in front ~ ??
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So, I have been trying to abate my problem in lots of different ways.
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I have tried using the Pen tool to draw behind the main shape, I've tried making a New Layer and placing it above and below and inbetween the main shape layer, I've tried adding the artwork to the Mask ... I've tried everything I can think of and I've been through many an article in the manual and FAQ's to no avail.
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I suppose, what I think I need to know ... is, how ... how on earth do I draw behind this main shape? Am I not able to do it because I am not getting behind the Mask?
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Jan 26, 2013
Why should scaling a layer in photoshop CS6, have an effect on the size of the file?
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Jun 12, 2012
I have a black/white linedrawing, TIFF, where I needed to replace som texts. I saved it as PSD, lassoed the texts, erased them and inserted the new texts in about 20 different places.
The text size is only about 6 pt., and the whole drawing isn´t more than about 14 by 14 centimeters. In the PSD file all the changes now appear in separate layers (with the background drawing at the bottom, see inserted .png) one for each erased bit of text, whereas I thought it would be convenient to have all in one layer.
How does this influence the filesize, and how do I combine all new texts in one layer, if that takes up less space? Layer 3-5 doesn´t seem to serve any purpose, how does one see what´s actually in a layer? I also need to save the file as EPS, and doing so the filesize goes from 3,4Mb in PSD to 45Mb in EPS. What are the possibilities of minimizing this EPS-file?  Â
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Apr 6, 2009
With same PSD file, I hid the layer visibilites and saved another copy, and I noticed that the file size was reduced dramatically.
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Nov 16, 2006
I've got image 50mb. I put one adjustment later levels on. My hardrive says that file is now 95 mb.
I don't get it.
Isn't the whole point of adjustment layers is that unlike duping the bg layer you save space on your hardrive.
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Jun 8, 2008
problem in photoshop when selecting a layer and deleting it from the layer beneath...
Layer #1 is on top of layer #2....holding down the apple key and clicking on layer #1 to select everything in that layer, then deleting that selection from layer #2 underneath it....this always results with thin ghost lines of everything that was deleted...
How do you delete a layer from a layer and not get those thin outlines off what you just deleted?
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Nov 21, 2013
the key functionality lost is the ability to use the previous layer mask for a new layer
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Nov 10, 2012
I can do one or another, but both at the same time? It is annoying because a mask selection turns into layer selection when you select a second layer/folder.
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Jun 20, 2009
(CS3) I have a raster layer that has some semi-transparent pixels.
I'd like to make the layer itself fully opaque, and move the contents of its alpha channel into a layer mask.
(If possible, merging the alpha channel with what I have already placed into the layer mask.)
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Apr 6, 2008
Is there a difference between selecting your layer and clicking Add Layer Mask Icon versus having that layer selected, hold down ctrl and select Add Layer Mask Icon?
Also regarding working in Lightroom, if I modify a jpeg, select another image from filmstrip to work on and then go back to the first image for more work, are those actions degrading image even though I never physically save and close.
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Dec 28, 2012
I am using PSE 11 and need a hint as to how to duplicate the picture layer and then add a layer mask. Still trying to figure this thing out.Â
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Nov 21, 2008
My production workflow involves about 20 PSDs that are updated on a weekly basis. Each PSD has 4 groups with new product images added every week. Every few weeks, to keep file size down, I like to delete all but the most recent product image. I'd like to automate this. I'm curious if this can be done without scripting? As is right now, each layer is given a distinct layer number - If I record an action to delete layers, it only deletes the layers with matching numbers... ie if I record the action to delete layer 147, layer 147 has to be present to make the action work.
If it can't be directly accomodated via an action,
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May 3, 2013
>ap alterations. I have collected many (over 100k) screeenshots of census data. In the interest of not using the actual captures (intelectual property restrictions), I have extracted the data alone to a new multi layered file with each address as its own layer. Some have 1 person, some have 200 people.
Can I export each layer to file in such a way that the canvas will not be the 75 inch canvas in the parent image? I needed to use such a large transparent background because population density is very high. Is ther an autodetect feature?
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Jan 11, 2012
If I switch from Frame Rendering to Layer Rendering I dont see any difference. Does it has advantages in certain situations to use either one?
Smoke 2013 Ext1
17" Mac Book Pro
OS X 10.8.5
16 GB RAM
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May 22, 2013
I've often been annoyed by the fact that that I need to go into the layer panel each time I need to switch between editing a layer and editing it's mask. Surely there must be a way to do this with a shortcut. I found a way to disable the layer mask in the shortcut menu, but this is not something I need to do that often. Switching between layer and layer mask, however, happens all the time - at least in my workflow.
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Jul 17, 2012
I can't figure out how I can use a text or shape layer as a mask for the layer below. See the example attached and you will know what I mean. (I created the example with simply cutting out the text outline from the white box).
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I need the text to be a mask and I need it to be editable as text. Don't know if this is possible, experimented with clipping masks but I cant make it work.
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Nov 3, 2013
I`m trying to swich a image on a layer whit a layer mask. I whant to keep the layer mask but change the image. When I paste a copyed image it the laye it creates a hole new layer. How can I change a image but keep the layer mask?Â
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