Bug description: When an apron with a texture is placed where a TIN building has been excluded the leftovers of the tin exclusion cause artifacts in the heightmap of the apron.
Repro steps: Exclude a TIN building and place an apron on top. If the texture has a heightmap it will cause artifacts
So we have figured out that there was already a topic for this problem.
I will close this topic as a duplicate.
And here is the link to the topic (so you can see when it will be fixed) :
I don’t see how this issue is related to it influencing an on the Apron and its textures on top though as this is not mentioned once in the bug report you just linked? (I mean I see how this bug you linked can have somehting to do with it, but the problem I reported is not mentioned in this linked thread)
The flickering when no custom ground textures are on top is one thing, but it having an influence on groundtextures that should cover this up is a bit more of an issue in my opinion and something differen in terms of severity and how it affects a custom scenery (albeit caused by the same problem).