Hi @techsalad I've run into a problem with your latest version (1.61) and GPU Instancing. I have a number of streetlights in the scene configured as fairly standard VLBs and they're fine. However I also have half a dozen "window beams" which are VLBs with square beams on the horizontal for showing light coming from windows. Everything works as expected when the global render settings are set to Single Pass. However, when I set it to GPU Instancing the square beams switch on and off periodically as you move around the scene. Note that this only happens in a build. Running in the editor seems fine. Setting VLB back to Single Pass rendering fixes everything in the build. Is there something you can recommend for remedying this? Ideally it would be great for all VLBs to be instanced (for performance), however if it's not possible to mix square beams and normal beams with GPU instancing, would it be possible to implement a switch that allows me to specify which VLBs should use instancing or not (rather than just the one global setting)? Thanks for your help!