CGTalk - No alpha on sprite shaders

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plug3

06-26-2003, 08:23 AM

Hi,

I cannot get the alpha channel to work from my sprite particles.
I am using a tga 32 bit file ( I checked in photoshop, the alpha channel is there) but no matter what I try I always get square sprites with solid black instead of transparent. I tried everything I could think of (alpha offset, alpha gain, plugin the sprite into the transparency of the lambert shader). Nothing seems to have an effect.
I am going cuckoo :surprised

tomb

06-28-2003, 06:50 AM

What graphics card are you using? I used to use a 3DLabs GVX1 and there were two settings: Maya and Maya with Alpha. I had to set it to the latter to get alphas to work.

plug3

06-29-2003, 09:31 PM

Thanks for you answer.
But I actually solved the problem. The original images were made in After Effects and even though Photoshop was seeing the alpha correctly Maya didn't. Resaving each image from Photoshop fixed the problem.

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