I'm talking about performance issues due to to many objects in one area or over maxing the Lightmap. I have the structure of my map complete, and now I'm at the decorating and fine tuning stage, but that old awareness of mine from previous Forges are making me afraid to add more detail to my map. What's the breaking point? What are the problem pieces in this Forge? What about the Lightmap? I've noticed that some of the Forge maps in matchmaking have their Lightmap % over the max. Does that mean redlining your Lightmap is okay? What's the breaking point for that? Mine is currently 99%. EDIT: I did a quick test with blocks. I spawned in small 2x2x2s until I hit the next %, then started my test. Spawning in 10 more 2x2x2s brought me up 1%, but spawning only 3 128x128x128 brought me up 1%. Then I learned that spawning 3 of any size 128 block has the same results as the full 128x128x128 block. It also take 3 256x256x4 floors to go up 1%. So for blocks at least, size matters except that whatever size you use, the game uses the longest side of it to determine the Lightmap % for it.