Nope, I mean 45. See where two faces meet, they each contribute half of the 90 degree fillet. They touch exactly at the mid point of the fillet.

The reason is this. What do you do where three faces meet? Think about it. If the top face did all 90 degrees of the top fillet, and the front did all 90 degrees of the fillet with the left face, then you could not make the top fillet agree with the side fillet. And you'd have to program the front face to not make the fillet with the top face.

My way, you make the fillet on all four edges, but it's only half a fillet. The adjacent square on each edge makes the other half.

I agree it is limited and you'd have to do different math for edges that were not at 90 degrees. Still, given that I can make nice fillets for boxes, this saves a lot of time. No modelling.

Yes I can handle cellos. Give me one and I'll put a shader it.

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Renderosity forum reply notifications are wonky. If I read a follow-up in a thread, but I don't myself reply, then notifications no longer happen AT ALL on that thread. So if I seem to be ignoring a question, that's why. (Updated September 23, 2019)