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transparency problem

NeHe Productions Affiliates

Started by alistair b August 06, 2000 05:51 PM

3 comments, last by alistair b 23 years, 11 months ago

alistair b

122

Author

August 06, 2000 05:51 PM

ok, i understand how to get use textures as alpha channel values, but i was wondering why when i use low alpha values, or dark colors i get a checked pattern on the screen. it looks like an embossed lattice, and i don''t like it. is it my TNT card, or is it opengl in general? (& if not what is it?) i''d include a picture, but i don''t know how. alistair

zedzeek

529

August 06, 2000 06:01 PM

maybe try
glDisable(GL_DITHER); also this should speed the program up

Captain Courgette, eat more veg

alistair b

122

Author

August 06, 2000 06:10 PM

no, that just makes everything look terrible, the problem seems to be something to do with 16bit color depth...so i guess its unavoidable...32bit is too slow on my TNT...

thanks anyway

alistair

Morgan

122

August 06, 2000 08:43 PM

Yeah, that''s my guess, you get a sorta checkered and/or swimming pixel effect when running in 16bit screen depth. Usually it doesn''t look so bad when your program is moving fast with a bunch of action, but it can look wierd when standing still.

Morgan

zedzeek

529

August 07, 2000 05:31 AM

this should make it look better glDisable(GL_DITHER);
anyways u could try
glTexImage2D(GL_TEXTURE_2D,0, GL_RGBA8, width, ...
this''ll prolly slow down the program but itll look better

Captain Courgette, eat more veg