Can't get transparency, please help

rm3 · 2003-03-26T16:42:05

I''m trying to get all black (0,0,0) pixels on a texture to not be drawn. So I tried what''s used in OpenGL Game Programming, chapter 15, to draw the cacti: glEnable(GL_BLEND); glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); glEnable(GL_ALPHA_TEST); glAlphaFunc(GL_GREATER, 0); When I render the quad, the black parts are still black. What am I doing wrong? My textures black is 0,0,0 like the cacti texture. Is there something I''m forgetting? Other blending like the blended cube demo from NeHe works. Is there another way of doing this? Any help is greatly appreciated. Thank you!

Graphics and GPU Programming Programming

Started by rm3 March 24, 2003 12:34 PM

10 comments, last by rm3 21 years ago

rm3

122

Author

March 25, 2003 08:34 PM

Okay! I got it working by using my own (well, I didn''t write it from scratch) bitmap loading function.

Thanks everybody =D

MARS_999

1,627

March 26, 2003 04:42 PM

You should really use .tga or .png or someother file format that supports alpha channel in the texture. I personally use .tga files for textures and can save the alpha channel with it.