I added additional setups to my test level with ISM and HISM BPs that have the meshes placed using the CS and with 8 meshes each with multiple placements.
L-R: Static mesh, ISM with transform offset, HISM with transform offset, ISM with CS transform offset, HISM with CS transform offset
If you’ve already got a question regarding using Actor tags and the CS then you should follow up there. I’m not going to repeat work here if it’s already being looked into with that ticket. I’m only interested in why the meshs are rendering black and if that’s caused by the way you’re setting up the CS then follow up on that question if it’s a regression in behavior. If you’re able to reproduce the issue in a simple project I’m happy to look, but again, I’m only interested in seeing if there is a regression in behavior here and not troubleshooting project specific issues that isn’t potentianlly a bug. This is why we are insistent on reproducing in a new project.
Once you’re able to reproduce the issue in a blank project, I’ll have a look for inconsistencies and issues with 4.12.5 to 4.13 with the lighting for the instanced meshes.