Hi again.

I've tried using anisotropic filtering but it's still had no effect on particular types of textures, in this case the curtains in the sponza scene

[attachment=26265:Untitled.png]

I've highlighted the unsightly phenomena - what kind of solutions are there, particularly in openGL, for reducing these kind of artifacts?

What texture filtering are you currently using for minification and magnification (i.e. GL_TEXTURE_MIN_FILTER and GL_TEXTURE_MAG_FILTER)?

Oh dear. Got those filtering parameters the wrong way round.

It's now