I opened 3ds max, created a 1x1 quad and exported it as *.fbx file. It showed up in Editor and I instanced it in scene but the size is wrong - it’s about 1000 times smaller than it should be. Obviously, scale is different. I would just make bigger object in max but I can’t as I don’t know what exact size I should use. Any advice?
I don’t know how to solve your 3ds import issues, but you can create a quad of specific size and orientation (horizontal or vertical) using the CreatePlane editor script.
The Units are different in MAX to Unity, so you have to either perform unit conversion in MAX or change the import scale in Unity appropreately