Sphere Mapping - Triangulation Shows

I would like to be able to apply spherical mapping to an object … it has one large flat surface and the triangles that make up this surface are being revealed by introducing distortion to the sphere map texture. I can actually see a shearing effect of the texture at triangle boundaries.

At first I thought that it was my code and maybe a problem relating to surface normals but I don’t think that it is.

Any ideas how I can avoid this problem … or fix it ?



Don’t use spherical map, but planar projection instead ?

Use cube mapping instead of sphere mapping.