please take a look at the attached blend file.
I have the letters ‘b’ and ‘f’ position above my green ground plane.
The material of the letters consist of 40% glossy and 60% diffuse shader.
If I render this I get a reflection problem on the ‘neck’ of the letter ‘b’.
I marked this area with the red arrow and the number 2.
In this area the green floor is not reflected, this area is darker.
To start analysis I added a cube and placed it above the neck of the ‘b’, see red arrow with number 1.
There you can see this part is rendered correctly it reflects the green ground floor.
Then I moved the cube towards and ‘inside’ the neck of the cube and rendered again.
You can see at the same position of the neck the cube is rendered correctly.
So there must be a problem with the ‘b’.
I tested also with blender font instead of verdana, but same problem.
Then I converted the ‘b’ to a mesh, but still same problem.
What goes wrong here?
Thanks for any help!
cycles_test.blend (1020 KB)