Photoshop :: CS5 - Any Color With Zero Red Information Will Turn Black?
Mar 4, 2013
I've been having this problem ever since I installed Photoshop CS5 (12.0.4) on a Windows 7 64-bit machine. I've used the program on a Windows Vista 64-bit PC in the past with no problems.
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Any color that has zero red information will turn black when in RGB mode and in either 8 or 16-bit mode. If I use the paintbrush, for example, a color with RGB 0/100/100 will be black. However, the color 1/100/100 will not. This problem also occurs with imported images. I've only tried JPEG and PNG so far. The problem does not save out though, as any image exported from Photoshop will appear fine. The issue seems to go away when in 32-bit mode, but it's a little RAM-intensive, and the file sizes are quite large.
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I have reinstalled Photoshop, reset its preferences, and reinstalled my video card's drivers (I have a Radeon HD 7870). My PC has 8 GB of RAM and plenty of free hard drive space.Below is a screencap of what's going on.
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Mar 24, 2011
I have a texture for an object that will be rendered. The RGB for the texture contains diffuse color, and the Alpha channel contains a special parameter for the shader. The value for the parameter is 0 for 99% of the pixels.
In my XCF I have diffuse color on one layer, and the special parameter on another layer (as a greyscale).
So I copy the diffuse layer and call the copy Final. Then I create a layer mask on the parameter layer using the greyscale value. I copy the layer mask from the param layer to the Final layer, and then I apply the layer mask to Final, which should simply write the mask to alpha.
I look at the channels window to be sure, and alpha is written correctly, BUT everywhere that alpha is black THE OTHER THREE CHANNELS ARE ALSO BLACK! I can't fix this! What do I do? I even tried exporting to see if it carries through to the output image, and it does!
What's more, I tried to trick it by putting a very low value (like 1/2) in the pixels that are supposed to be 0 in alpha, and then I get an even weirder effect, wherein most of the color is kept, but some pixels color information is trashed anyway. Is there an export mode which will tell GIMP not to trash the color information on fully transparent pixels? Or better yet, can I tell it that alpha is not transparency?
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best way i know so far is playing with "exposure" settings. but this time the objcet on the image is becoming blure and loosing its texture.
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i need to make that shoe as white/colorless as this one below.
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