On 07/12/13 18:24, David Given wrote:
[...]
> 	face_indices {
> 		12,
> 		<0, 1, 2>, 1, 0, 1,

Arrgh --- I hadn't twigged that the texture values here are *integers*
--- indices into the texture list. Interpolation isn't done if you
supply a fractional value.

So instead I've wedged my texture values into the u channel of the uv
mapping, and am then doing this:

	object
	{
		mesh2
		{
			#include "/tmp/mesh.inc"
		}
		scale km

		uv_mapping texture
		{
			gradient x

			texture_map
			{
				[0.0 pigment { rgb <1, 0, 0> }]
				[1.0 pigment { rgb <0, 1, 0> }]
			}
		}
	}

Simple, easy, effective, and doesn't need face_indices at all.

In fact this has shown up a fundamental flaw in my logic, which is that
by using a simple linear range of textures like this I can't interpolate
from texture #0 to texture #10 without going through all the textures in
between, which would look a bit odd. So I'm going to have to rethink my
reasoning from the ground up.

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