Maybe a tip. Sometimes while starting to test a level I have long time to wait with CREATE AI OBSTACLES. What I am doing is before testing go in free flight mode, flying high and looking for lost objects around the GG borders. Sometimes the objects lies in the "water" behind the GG borders. You can fly behind GG borders and delete all these lost objects, fly and look in GG borders for lost objects and delete them. I reduced my starting testlevel time with more than 4 - 5 minutes. The winning is
1-2 FPS also. The problem with selecting and placing objects is that sometimes you loose one or more objects. I found these objects back around and behind GG borders.

A good practice. Also make sure that objects on the ground are truly on the ground, or it will try and include that in the calculation.

Turn off physics for objects that the player or AI will not get near or need to move around. this will increase performance also and shorten the obstacle build time.

Maybe it is possible to create a function that will delete objects outside the GG borders.
The problem with placing objects inside buildings will cause putting the objects upside the building while pressing the enter key
When objects colliding with each other will that cause performance problems also?

Currently there is no way to destroy or create new entities in the LUA system but its one of the things we should be adding if the voting goes that way (after performance). I think increasing the power of LUA rather than hard coding functionality is the way to go so if you vote for LUA you will likely be voting the the feature described here!

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