I hoped to get a little wiser by learning how to translate shaders.  Or to find out whether it is not possible at all. I wonder, do you know if there is a way to let Poser "evaluate" the shader functions and access the output as a grid of values, so one could "render" into maps if the shaders are not translate-able? At least for 2d nodes...

If the code is on your free-stuff page, I will happily have a look at it.