I recently noticed a crashing in Rocky Mountains tileset, since this reported other players too and updating graphic drivers didn't fix it. I looked into it. After few hours I found the tiles causing this, its tbm18_z01_01, tbm18_z02_01, tbm18_z03_01.
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I know edge tiles mustn't have lights but this is suprisingly not the case. I found out that its the two vertical branches with tree foliage that are causing this. Unfortunately I have no idea why. So far I simple deleted these objects from tiles and Im happy with that, however I would love to find out why its causing this. What is so wrong about them its crashing. Could help me fix other tiles in future.
Any ideas?