1170f5f6ed
- changed code to make use of actual textures, not the hackish 'externtex', which is only for tools - added a 'displacement' vector in ShadeInput, and moved calculation of displacement vector to texture.c itself. So it works with stencil, but also for options as 'add', 'mult' and 'sub'. - for RGB textures it uses the brightness value of color for displace - for stucci, and plugin textures returning a normal, it uses that - Also: wrote call in end of preparing renderfaces, to split non-flat quad faces in triangles. gives a lot fewer errors in displace textures, but also raytracing irregular subsurfs goes better now. - texture mapping that works for displace: orco, sticky, global, obj, normal. UV not yet. Reflection-displace? uhh! :)
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