It’s great to have a 3D environment when you’re working on 3d characters/environments for game. It allows you to see your result in real time so you can fix/improve what is not right. I’m looking for a 3d engine/software whose sole purpose is to import models and test things out. Are there any? I’m looking for a very good one, one that allows you to import your 3d environment and walk around it. One that test all short of things like smoke, light so I can see how my environments and characters model respond to game physics.