August 2009 Archives

This is an HD video. Click through to youtube and watch it large.

Some people approximate the pelvis as two disks. Others compare it to a bowl. Still others use a box. None of the approximations is exactly right. As Glenn Vilppu puts it, 'The best thing is to just learn the shape of the pelvis.'

I'm using a box as a means of locating the major landmarks of the pelvis in order to better study the artistic anatomy of the skeleton.

Previously:
Anatomy Practice: The Pelvis

A second look at the same animation, this time accompanied by a simplified model version of the pelvis.

scan-13, originally uploaded by jfrancis.

I bought a vintage Chinese newspaper so that I could scan it for interesting textures.

I have no idea what it says, or what it is called, but the eBay seller told me it was from Hong Kong, 1946.

The peachy paper is actually browner and more subtle in person. I should have toned it down a bit.

Click through to the flickr set for more.

A 2 foot by 3 foot softbox facing a parallel wall 9 feet distant - simulated in Maxwell Renderer v 1.7

Softbox with 1" deep egg crate grid - a Maxwell Render simulation

Softbox with 2" deep egg crate grid - a Maxwell Render simulation

Softbox with 4" deep egg crate grid - a Maxwell Render simulation

Softbox with 8" deep egg crate grid - a Maxwell Render simulation

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Here is a 30 minute render of a CG model using Maxwell Render 1.7 to simulate a softbox gridded deeply, shallowly, and not at all.

The three frames were all of quite different exposures. The deeper the grid, the more light was lost. Maxwell images are 32-bit HDR files, so I equalized them in Photoshop. You can see how much noise remains in the deep grid image after a half hour of rendering.

As the grid gets deeper, the light rays become more parallel, and the shadow on the wall becomes sharper, as if from a harder light. I find it hard to see much difference in softness or hardness on the figure itself, although with more light on the wall there is more bounce fill and less contrast.

Torn Paper Edges, originally uploaded by jfrancis.

Real (not simulated) Torn Paper Edges, originally uploaded by jfrancis.

Some torn blue paper with a ragged white edge scanned against black.

There should be enough value and chroma difference to separate the blue from the white, and enough contrast value difference to separate the white from the 'black'

The real thing. Not simulated in Photoshop.

Paper is plain blue wrapping paper for sale at Target.

Click through to the flickr set. I'll add some more...