Effect of object thickness on reflection path

[Zhong0501]

Hi, I found something interesting, when Sionna performs simulations of indoor scenes, the wall thickness affects the number of reflection paths.
As you can see in the picture, two walls with different thicknesses have completely different numbers of reflection paths, the thinner wall has a lot of reflection paths, about 8, and the thicker wall has very few reflection paths, only 1. What is the reason for this?

[jhoydis]

Hi @Zhong0501,

We would need a working example for this. I am just guessing, but it looks as if the thick walls are rounded. Maybe they consist of a very large number of primitives (i.e., triangles) with slightly different normals which could impact the specular reflections that are found.