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Is there any known maximum limit of polygons after which Gamestudio won't perform well any longer? (For example, after 150,000 polygons per level). Not that I will never use that many in a single level, but just to plan ahead of time.



If you want to find the limit, there's always ways of doing it. An obvious limit is 32,767 (or 65,535) polygons for a single model. For a whole level, it can easily end up in the octuple digits count area for extremely large and complex levels (or for testing and experiments). To test it, create a 30,000-poly model and add it to WED. It'll take a very long time to load (which seems suspicious). Then, just duplicate it several times. 33 copies will get you near a million polygons. An obvious downside to high poly is that it'll take more time to calculate the positions of each vertex and draw each face. Vertices have 3 or 4 times the impact on the frame rate over faces (and I've tested this).

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Also, the Map Compiler talks about Max. Level Size: 56000. What's that value?



This is the boundary limit. That only applies to blocks though. You can increase it to 250,000 at the most (no block can be 125,000 quants from the origin though). If you need to go bigger, use models. You can place a model at 800,000 quants from the origin without any issues and possibly even as far out as 2,050,000 (unconfirmed and partly untested). I've had the camera out to 1.4 million quants and an entity moving with the camera at a slightly slower speed causing it to be roughly 1.3 million quants from the origin.

"You level up the fastest and easiest if you do things at your own level and no higher or lower" - useful tip My 2D game - release on Jun 13th; My tutorials