displacement
jekaRustdis(float 	Km = 0.1, /* displacement magnitude */
					nw = .3; /* bump weight */
	 string texname = "",
			subbumptex = "",
			humptex = "";)
{
float	hump = 0;
normal n = normalize(N);
hump = 0;
if(texname != "" )

//#### WHEN RED, CREATE SUB BUMP
float redchan = texture(texname[0]);
float subbump = ((((noise(s*300,t*300))*(asin(redchan)*.15))*.2)+(((noise(s*200,t*200))*(redchan))*.2))*(nw*.5);

//#### CREATE BUMP WHEN BLUE
float bluechan = texture(texname[2]);
hump = ((noise(s*150,t*150))*bluechan)*nw;


if(subbumptex != "" ){
	subbump = ((texture(subbumptex))*redchan)*(nw*.5);
}
if(humptex != "" ){
	hump = ((texture(humptex))*bluechan)*nw;
}

P = P - n * (-hump-subbump) * Km;
N = calculatenormal(P);
}