Since I have been told that I am a very naughty boy and must not use
assumed_gamma 2.2 nor misuse irid in any way shape or form, I have reworked one
of the images in accordance with this new theology.

Points of note. The meshes need severe sub-division, the more the merrier. I
also ran the gamut of 20 to 50 mm_per_unit for SSLT and settled on 40. Irid is
really good at highlighting the normals which SSLT tends to hide.

But ... is this necessarily a good thing?

Simon.

PS. I do have an excuse for 2.2, though! CRTs! And POV-Ray versions 1, 2, 3,
3.5, 3.6, 3.62......... And CRT's! Do NOT forget CRT's!

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