Seamless Cube Maps on OpenGL ES 2.0 using iOS?

Question

Is there an equivalent for

glEnable(GL_TEXTURE_CUBE_MAP_SEAMLESS);

in OpenGL ES2.0 when implementing cubemap samplers? I'm developing a test app on the iPad -- cubemapping a sphere -- and I'm getting seams between each face of the cubemap.

Or if there is no magic glEnable for ES2.0, what is the best way to get rid of the seams?

Answer 1

OpenGL ES does not have the equivalent of desktop GL's ARB_seamless_cube_map functionality.

And no, glTexParameteri(GL_TEXTURE_CUBE_MAP, GL_TEXTURE_WRAP_S/T, GL_CLAMP_TO_EDGE) does not count. Seamless cubemapping means that texels from different faces can be blended together. Clamping to the edge means exactly that: clamping to the edge of a face. What you've done is make the seam less noticeable; it's still there.