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No. 820:

First | Previous | 2011-03-09 | Next | Latest

First | Previous | 2011-03-09 | Next | Latest

Decoded from alien signals by: unstattedCommoner

The author writes:

I'll let you into a secret: the background of this strip is computer-generated wax crayon.

I wanted to get the perspective of the image on the ceiling and end walls right. It's designed to create the illusion of a row clerestory windows with a fan vault above, with the perspective appearing correct only when standing at certain points (those marked 'A' and 'B' on the wireframe image below; in the first panel, the random guy in the background is standing at point 'A'). The actual ceiling is a barrel vault. Here's the wireframe of the actual room:

wireframe model 1

And here's the image on the ceiling, as if the vault were flattened, together with the images on the end walls:

wireframe model 2

I then had to work out exactly how "wrong" the perspective would be if one stands where the "camera" is (points 'C1', 'C2' and 'C3' in frames 1, 2 and 3 respectively). That was the simple part.

The hard part was to keep as much detail as possible while making it look like a hand-drawn wax crayon image. I'm reasonably happy with the result.