Finally managed to get texture mapping working inside Maya, using Liquid and rendering with Aqsis. I am probably doing this the long way, and there is probably a much better and faster workflow, but this works. I was asked to add my findings to the Aqsis Wiki, so here it is.

If I have time, I may look at a better way of getting the HyperShade Shading network into compilable SL code, but at least I have something to render now.