On 5/3/2017 3:38 PM, Heriberto Delgado wrote:
> Hello everyone!
>
> I'm entirely new to POV-Ray, apologies if this sounds like something only a
> complete newbie would ask.
>
> Does POV-Ray possess something akin to vertex / fragment shaders, as in small
> programs able to preprocess vertex input for polygon meshes,

Not exactly, but in the past I wrote a POV macro that would read the 
text of a mesh file, manipulate the mesh, and then build it within POV 
(I was doing tessellation at the time, but with this method you could do 
pretty much anything a vertex shader could do).

> as well as
> modifying color information for each pixel ("fragment") captured from the scene,
> as seen in GPU-based video adapter hardware nowadays?

Again not exactly, however POV-Ray possesses a very sophisticated 
texturing system that allows you to define procedural textures for your 
objects.

You might get a better answer if you told us what ends you wish to 
achieve, rather than asking what tools are available, and we'll let you 
know how to accomplish it with POV.

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