OpenGL - white edges on cubes

Question

In a minecraft-like game I'm making, I get white edges on my cubes:

It is much more noticeable in darker textures. The textures are being setup like this:

glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);

Any help?

Have you tried changing the texture environment param GL_TEXTURE_ENV to GL_REPLACE? `glTexEnv(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);` — Foggzie, Dec 19 '12 at 00:12

score 2 · Accepted Answer · answered Dec 19 '12 at 00:50

If you're using nearest-neighbor filtering (glTexParameter(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST), this is the result of that. Because of the way vertices are transformed, sometimes this results in a texture lookup one pixel outside of the tile you want.

The solution is fairly simple, just take all your texture coordinates and move them into the tile by the size of half a pixel, i. e. (1.0f / width) * 0.5f. This guarantees that a pixel's nearest neighbor on the texture is never outside the tile you want it to be.

OpenGL - white edges on cubes

1 Answers1