Wrong node gets connected when baking across several scenes

[Naxela]

Error, where material indices are shifted when baking different scenes sharing the same materials. This causes black materials, as a wrong node is connected to the output material node before lightmap baking.

https://github.com/Naxela/The_Lightmapper/blob/46288b24374f7e6cf3e7acf387f55fe150fddb0b/addon/utility/cycles/prepare.py#L335

In the meantime, the recommended approach for separate building parts is to divide by blend file if they can't be combined.