About the reflection on the slopes: I had a similar effect on (sloped) tiles. Under the import option, there's a setting called 'Use curved wall normals' which is on by default. If you turn this off, the reflections should look less weird.
The github page mentions the following about this setting:
And the idea is nice, but when parts are in a certain angle to the lighting it creates this weird effect.
The github page mentions the following about this setting:
Quote:
- Concave walls - Optionally look as if each brick has very slightly concave walls (with the photorealistic renderer), which affects the look of light reflections.
And the idea is nice, but when parts are in a certain angle to the lighting it creates this weird effect.