Hi folks ! I''ve got something strange going on..... My terrain is made up of tiles (16*16 Vertices, TriangleStrips). Each of these tiles has got it''s own texture, what looks very good, BUT: Around each texture tile, there is a thin border (width 1 pixel), that has only one color (this color seems to be mixed out of all colors in the texture). If I put together these texture-tiles in Photoshop, there is NO border, so I''m shure that OpenGL is screwing something up.... Has anyone an idea, how I can solve this prob ??? Thanks, VanKurt

If it''s what I think it is, this is OpenGL''s way of making the texture tile-able.

I.e. when you are trying to have a texture, of size 1x1, cover an area 4x4, OpenGL can be set to automatically blend this edge texel so that when the texture is "repeated" there is no noticeable edge (or at least not quite as visible without it). I guess if your texture is already made in this way, this feature might be inconsequential.

What you''ll be using is GL_REPEAT -
glTexParameterf( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT );
glTexParameterf( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT );

What you want is GL_CLAMP -
glTexParameterf( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP );
glTexParameterf( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP );

Though this has the problem that when specifying texture coordinates, you can only use values between 0 and 1 or it continues the edge texel off to whenever...

Hope this is what you mean.

Then again, I just re-read your post and think I got totally the wrong idea... whoops

Hey, where are you OpenGL-Wizzard-Gurus ? ;-)

Perhaps there is something wrong with my openGL texture-settings...?