http://www.babylonjs-playground.com/#CVC1M#0
var sphere = BABYLON.Mesh.CreateSphere("sphere1", 16, 2, scene);
sphere.material = eash.shader(
eash.alpha()+
eash.range({
mat1: eash.solid(0xffff00, 1.0),
mat2:eash.noise({pos:'pos*5.'}),
dir:'pos.x+0.5',start:0,end:1})
, scene);