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Well, rendering scaled/rotated 2D sprite is a matter of skipping one dimension and use the exact same code as with 3d rendering. So yeah, draing only two textured triangle and rotating 4 vertex is pretty fast. That could indeed be used.
The reason things are made from triangles in 3D is: a polygon with 3 vertices defiines a plane - one with 4 vertices can define up to 2 planes*edit*so with a triangle you always know whether the whole thing is visible or not.
Do you guys still remember the ravenfield topic?I guess such a simplified character model (rather similar to minecraft) would be enough for testing the speed in a first demo Even tho it wouldn't really show the true beauty of the light stuff :/
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