That's just the way Marmoset toolbag renders wireframe (as tris). I'm pretty sure OP is using marmoset :P Edit- Forgot to write what i wanted to say about the models lol. I agree with D walker on the dust, work into that a bit :D. the painted metal looks great you really nailed the spec and I love the little chips and…
So many comments, thanks all :) Mischievous: as MrPopo mentioned, it's indeed the previewer that makes everything into triangles, but when I export I always just completely triangulate it (as you see it in the screenshot). But I do use them, if triangles are giving problems, it's usually something that isn't right in my…