Glass tiles anyone?

[vrenaud]

Hi,

Another newbie trying hard to render glass using skindigo...
The goal is to reproduce glass tiles as a kitchen backsplash meaning the glass geometry is placed against the kitchen wall.

There are two issues I'm struggling to resolve:
1. noise or speckle (bright pixels) on the glass surface that don't seem to wash away over time
2. Glass tiles looks too dark and generally, the tiling (grout) effect isn't visible.

I'm attaching two images, one is the glass tile sample (from the manufacturer's website) that I'm trying to render and a sample render showing the issues.

I've seen lots experts advice searching through this forum.
Hope someone can help me here.

thanks in advance
Vincent

[CTZn]

Hi Vincent,

Don't use a glass material for your tiles, they are supposed to be opaque I guess so a phong would do better, with the texture as albedo. But then you will lack the right texture for bumping the tiles out of the grout.

If you are after accuracy, leave the texture alone, it should only serve as a reference to recreate the tile geometry. Model one tile and use proxies/instances to place copies accros the walls, though the grout geometry. There was a recent thread on the matter but I couldn't find it (about displacing tiles out of a wall).

The noise may come from a glass material in contact with another material. There should be a minimal distance of 0.2mm between glass and any other material type (but specular/specular, specular/glossy transparent and glossy transparent/glossy transparent materials can be in contact and even interpenetrating if their precedences are under control).

PS: Can you please state the softwares versions you are using (3d application, exporter and renderer versions) ? It may help about specific tech details.