OK since no one has answered this I guess its not seen as relevant (or its just seen as Richard ranting again)
Well to continue the rant:
What I am trying to do is recreate some of the stunning imagery seen in AVATAR. To do this I ned to create floating mountains with populations.
This runs into a whole stack of problems that I have been working through over the past 6 weeks, its slowly driving me over the edge.
Here goes:
To create a floating mountain (capable of supporting a population) I need to use two displaced planes. One plane is displaced positively and one negitavely. Fair enough, not a great problem you might say. I can do this in two ways either with an image map or with a .ter file. Using the .ter file is more accurate but the negatively displaced ter is inside out, the normals are facing inwards (actually this is entirely as it should be, just not how I want it). Using an image map is less accurate (I can derrive an exr image from a .ter displacement and convert it to a tiff for greater accuracy but its not as good as the orrigonal .ter) but the trouble here is that for some reason I cant fathom the masking of an image mapped plave dose not mask its shadow casting. It will self shadow but not cast a shadow onto itself with out casting the entire square planes shadow.
So either this is a problem that cant be solved, a bug, or I am simply approaching this wrong.
So is there a solution or should I just give up (please no, I have invested far too much time in this to just walk away)?
Is there some function trickery that will turn the normals round in the .ter?
Have I simply missed some obvious point?
Heres hoping for a solution.
Richard