Using your same stupid example! Please note that the triangles are the same with both, and whether you see them or not, they EXIST and they count towards your rendering because that is how computer graphics works!
Okay, not sure if I should be posting in here, and not sure if this guy is serious... But if he is, he might have something about the triangles causing a performace drop. Not in the engine of course, but in the 3d modelling app. The more lines your card has to render, the more memory the program takes up. For example, in…
Dude we're just trying to help. Now for the sake of it, lets imagine that your weird configuration (whatever computer you're running, whatever exotic N-gon engine you're messing with) DOES display a single 5-gon faster than five triangles. Fine. Now consider this. 99.9999999999% of other gameart scenarios don't behave this…
As stated by others, most engines out there only render triangle meshes. Software or hardware side optimization aside, there are other pitfalls caused by geometry, here's a few examples. The original polygon models on bottom, bad render mockups on the top. The left and right ones demonstrate bad fills in different ways.…