test.3dm (47.3 KB)
So attached a very simple example. A vertical surface 250 x 500 mm, and two horizontal surfaces at top and bottom end, 5 mm deep, 5 mm away from the edge. no plugins, just rhino render
The vertical surface has a bump map 2d checker texture default from Rhino, in this case a repeat of 40 x 20 to achive the rough size of a mosaic tile.
Originally I did not have any lighting, the scenes below have skylight (just because it highlights the reflection better.
here is the result
with a frontal view
note that the horizontal surfaces are reflected da infinitum
zooming the “bump depth” looks pixelated bars that do not scale regarding the repeat numbers (and therefore with a high repeat number become almost as big as the texture). and do not vary with the grayscale value.
here with black and white chedkers
here with white and light grey
here with black and dark grey
here with 20x10 repeat
How to control the bump depth (no plug-in)?
How to improve the quality?
How to avoid the infinity reflection?