Graphic Design Stack Exchange is a question and answer site for Graphic Design professionals, students, and enthusiasts. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I need to use GIMP instead of Photoshop, but I have a problem doing some things with transparency:

I explain: I manipulate some tga files that have 4 channels, rgb and alpha.

Using Photoshop I'm able to draw into the 4 channels independently, and the alpha is used like the other channel: here is a shot:

photoshop layers

If I try to open the same tga image (32 bits compressed) with gimp:

gimp layers

you can see that the 3 channels rgb are masked with the alpha channel, and the image is uneditable...

Any suggestions?


share|improve this question

In your Photoshop screenshot, the alpha channel is not marked as visible. In the GIMP screenshot it is.

Try clicking the eye icon next to the alpha channel in the channels dialog. That should hide the alpha channel, allowing you to see and edit the other channels even in areas where the alpha channel is fully transparent.

share|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.