Is there such thing? or they are going by per draw call per actor?
To create character through 2D? You mean sketch by lines with various options?
So you are in the right palce, because I know and I using software for sketch. It has many options, easy to use and you can ‘extrude’ selected object to 3D size and of course, support FBX, OBJ, 3DS, STL, DXF, AI.
As you can see. it is static mesh for my city map.
But I never had idea for create character and suit, gear, whatever. First I need plan of character and data, such as sizes of lines with four perspectives in T pose.
Anyway I only found in search this image.