The hard part is getting the alpha channel to a layer mask Game maker can recognize.
If you have photoshop, you can use this tutorial: http://www.64digits....m...ame&id=1858
But, not everyone has photoshop, so I'm going to show you how to use gimp.
EDIT: Updated easier method!
Step one: Fire up gimp and open the file you want to use.
I used this image from w3 schools in this example: http://www.w3.org/Gr...G/alphatest.png
Step two: Right click the layer and click "Add layer mask." Choose the "Transfer layer's alpha channel" option
Step three: Right click the layer and click "Show layer mask."
Step four: Click on the small picture of the alpha mask on the layer (refer to the picture if you don't understand.)
Step five: Go to file>save as and save it. You should see a window popup that says:
You are about to save a layer mask as a *file format here*.
This will not save the visible layers.
In the next popup window, click "Ignore"
The final result: http://i76.photobuck...finalresult.jpg
If you need help getting this in game maker, see this topic: http://gmc.yoyogames...opic=252411&hl=
Edited by gamer freak, 04 August 2008 - 05:19 AM.