Procedurally Bump-Textured Sphere
Really simple shaders can make very cool textures!

LUMPY:  .03 * noise(8*x,8*y,8*z); CRINKLY: -.10 * turbulence(x,y,z); MARBLED:  .01 * stripes(x + 2*turbulence(x,y,z), 1.6);

double stripes(double x, double f) { double t = .5 + .5 * Math.sin(f * 2*Math.PI * x); return t * t - .5; } double turbulence(double x, double y, double z) { double t = -.5; for (double f = 1 ; f <= W/12 ; f *= 2) t += Math.abs(noise(f*x,f*y,f*z) / f); return t; }