Hello, I want to texture a terrain this way: - A big basemap (size b x b) - A big lightmap (size b x b) - A detail texture map 1 (size: a x a) - An alpha map that indicated, where texture 1 should be visible (size b x b) - A detail texture map 2 (size: a x a) - An alpha map that indicated, where texture 2 should be visible (size b x b) ... Therefore I want to use multitexturing (1pass). My problem is to combine the detail textures with the alpha maps and combine the result with the basemap. How can this be done? Thanks,

what level of hardware do you want this to work on?

it should run on a radeon 9000 or higher. i tested it with 6 textures and got around 60-80fps but i did not get it working with the alpha-maps.

the whole thing is also more for learning and testing opengl than for producing a high end app ;).