I wanted to create a new prefab to see if with that would fix the problem, but when I pasted my prefab I had this kind of errors:
2021-09-01T22:53:36 2508.724 WRN MG build 1057, 1058
2021-09-01T22:53:38 2510.220 WRN MG build 545, 546
2021-09-01T22:53:55 2526.926 INF TileEntityPowerSource not found (5, 76, 143)
2021-09-01T22:53:55 2526.926 INF PowerSource not found (5, 76, 143)
Failed setting triangles. Some indices are referencing out of bounds vertices. IndexCount: 2820, VertexCount: 575
(Filename: C:\buildslave\unity\build\Runtime/Graphics/Mesh/Mesh.cpp Line: 1235)
Failed setting triangles. Some indices are referencing out of bounds vertices. IndexCount: 2820, VertexCount: 575
(Filename: C:\buildslave\unity\build\Runtime/Graphics/Mesh/Mesh.cpp Line: 1235)
I don't know if it's related. I think my prefab is too big or is my 4 smoke chimney placed upside down ...? Result there is only one part which is paste.