Flipped normals on Snowdon balustrade

[r-veenstra]

Noticing flipped normals on Snowdon Architectural, top balustrade.

Exported with latest main and tiled with latest tiler. Flipped normals appear in the exported glTF when imported into Blender.

An FBX export from Revit in Unreal, and the FBX in Blender and 3DS Max is okay too

Curiously, that same FBX uploaded to ion and tiled has bad normals. I've seen stuff like this before with negative scale values? Perhaps Blender/Unrela are handing the FBX better?

Also this area, normals are flipped in our export, but fine in FBX

And these panels on the stairs

Note the FBX version (pink) appears ok

[lilleyse]

Not much that can be done on the design tiler side. If there is a negative scale it's baked into the vertices. No node matrix.

[r-veenstra]

Datasmith handles this area okay

Our tileset struggles

[r-veenstra]

Also looks like rotation is playing a part. Note the block and curved columns with incorrect normals compared to the rest of the geometry.

Anything with normals facing the wrong direction has a Z rotation value != 0.0 (this is from inspecting the FBX in 3DS Max). The normal rotation offset appears to align with the rotation.

Also confirming the components that appear to be flipped inside out have a negative scale value in the FBX when opened in 3DS Max

[r-veenstra]

Note this issue is in 1.0.0 and is not new.

[r-veenstra]

FYI I notice Datasmith exports are batching these railings in a similar way to us, though normals are ok. FBX exports from Revit keep the individual components separated.

[r-veenstra]

Also observed in the Site export