Depthbuffer and clear areas on a texture

WhatEver · August 20, 2002, 2:53pm

Is there any way to make a 100% transparent area on a texture get ignored by the depthbuffer? This would be VERY cool.

I notice in Q3 that grates and stuff draw correctly and I doupt they draw from furthest to nearest.

PH1 · August 20, 2002, 2:56pm

The alpha test can be used for that ( in fact, that’s what Q3 uses for that particular effect ).

WhatEver · August 20, 2002, 5:17pm

Yay! Thanks!

I will have to play with that !

WhatEver · August 21, 2002, 12:58pm

Here’s one for ya. Is it possible in OpenGL to stop from writing to the depth buffer when the alpha is less than say 0.9f yet still draw the pixel? If this is possible then I wouldn’t have to manually disable the depth test when objects are suppose to be semi transparent.