Greetings,

What is the maximum 3D texture that can be loaded on ATI X1800 512MB
card? The theoretical limit is reported as 2048x2048x2048. However I am
unable to load more than 512x512x512 (8-bit, GL_LUMINANCE).

nVIDIA 7800 GTX too, although having 512MB, limits 3D textures to
512x512x512. Any idea if this will be increased in future drivers?

thanks,

Maniam

clunis_immensus@hotmail.com wrote:
> Greetings,
> 
> What is the maximum 3D texture that can be loaded on ATI X1800 512MB
> card? The theoretical limit is reported as 2048x2048x2048. However I am
> unable to load more than 512x512x512 (8-bit, GL_LUMINANCE).
> 

glGet() returns the biggest single dimension for
a texture, not the biggest cube. eg. You might be
able to do 2048x128x128 on that card.

Similarly for 2D...

The only way to find out if a texture fits is to
use GL_PROXY_TEXTURE_XX as the texture target for
some image data.


> nVIDIA 7800 GTX too, although having 512MB, limits 3D textures to
> 512x512x512. Any idea if this will be increased in future drivers?
> 

Only NVIDIA/ATI know things like this and they
normally don't tell.



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