PJB3005 wrote:

I think it's related to the blending though, not the amount of atoms.

...I'm not gonna pull this thread off topic further. Per-pixel lighting like that will never work, and it shouldn't.

With that approach, you are limited to a 128x128 map with nothing but pixel lights on the map because of the built-in object limit of 17 million objects. DM will crash long before you reach that limit. That's a solid reason for your game to be crashing.