Texture borders won't help (as we said there are constant). There's a new concept of texture border coming up but that isn't close to what you need.
I try to address a similar problem in my voxel terrain tutorial : how to make
tile things that don't tile. Of course your problem is different in nature but you could think of a similar solution.
Here's what this look like, the problem is on the borders of the individual quads, color on one side doesn't match color on the other one.
Not much you can do with that geometry unless you want to pay a huge amount of processing in the pixel shader to try to make it look right (and centroid has nothing to do with it since it's only for the multisampling case that we haven't hit yet).
Here's a proposition :
You add additional quads on the border between two quads with a different textures that don't match. The additional quad has two textures setup to it, but the blending factor is linearly interpolated between borders so that the stitching look almost invisible.
Hope that helps.
LeGreg
It's a simple grid of quads with part of a texture applied. Seems that the texture addressing for the filtering is causing them to stop tiling seamlessly.
It works fine with regular point filtering:
So I'm pretty sure it's a case of bilinear filtering addressing texels that cause it to go screwy.
I've tried the usual things with offsetting the texture coordinates so that it's not addressing pixels outside of the tile (or wrapping around), but in this instance it hasn't made any difference [sad]
The only thing I've got left to try is modifying the artwork to have a gutter/repeated border so that it addresses the correct pixel. That's a tiny bit annoying as it makes creating the art a whole lot more tedious/difficult.
Anyone got any other ideas?
Cheers,
Jack
