TIling Texture UVs outside the 0-1
polycounter lvl 5
Hi.
I thought it was a general practice that if you're making tiling textures, that it was no problem taking the UVs and putting them outside the 0-1.
Is there any reason this would be a bad idea, performance wise?
I thought it was a general practice that if you're making tiling textures, that it was no problem taking the UVs and putting them outside the 0-1.
Is there any reason this would be a bad idea, performance wise?
Replies
If you're transform bound (vertex count is limited) then you can reuse the lightmap UVs for your tiled textures, by setting the tiling amounts in the shader.
So. In anticipation for the lead or the "senior" to shit bricks, I thought I would ask, since, as I was taught in school, it was totally fine. But school and practice are two totally different animals.
I did go looking in other forum posts and never saw anyone say anything about it doing anything performance-wise.... just that it would tile (or not, depending on the shader).
Could also be the coworker misheard the instruction, or is blowing it all out of proportion.
On lower end hardware, you can run into precision issues if the UV is really far away from the 0-1 "home". But that's pretty rare these days, unless you're doing mobile development, or doing PS2 dev.
There's also an issue with long thin triangles, which can stress the renderer out. But that's not a UV issue. And can fixed pretty easily by just cutting the mesh in a sensible amount.