I would like to generate some earth-like/mars-like/giant-gas-like planets/moon/asteroid textures with normal map and specular map as 4k PNG files (4096 X 2048 pixels), to be mapped on a sphere with some 3D software.
I really know nothing about generating textures using Mathematica, so I'm starting from scratch here, and need help to write a full code to do this.
The exported textures need to look realistic, with random mountains/valleys, craters, turbulence in the gas-giant, etc. The files need to be of resolution 4096 X 2048 pixels (or better), and have the standard mapping on a sphere (I think this is the Mercator projection, but I'm not sure).
How to start this project with Mathematica ? Is this too ambitious to be done with Mathematica ?
(I suspect that the generation process may be too slow with Mathematica, at that resolution, and it may be better to learn to use another specific software to generate planet textures)
I'm thinking about textures a bit like this one (this is just an example) :
EDIT 1 :
If possible, codes should be compatible with older versions of Mathematica. Personaly, I'm still using version 7.0. But the questions above are applying to all versions. Please, if you post some code, specify to which version it is applying.