#include "T_arkonstahl.pov"

#declare T_luft = 
	texture { pigment { color rgbt 1.0 } }

#declare huelle = 
    union {
	difference {
	    sphere {
		<0, 0, 0> 50
	    }
	    sphere {
		<0, 0, 0> 49.5
	    }
	    box {
		<-100, -100, -100>
		<   0,  100,    0>
	    }
	    texture { T_arkonstahl }
	}
	difference {
	    sphere {
		<0, 0, 0> 49.5
	    }
	    sphere {
		<0, 0, 0> 48.5
	    }
	    box {
		<-100, -100, -100>
		<   0,  100,    0>
	    }
	    texture {
		crackle 
		texture_map {
		    [ 0.0 T_arkonstahl ]
		    [ 0.2 T_arkonstahl ]
		    [ 0.2 T_luft ]
		    [ 1.0 T_luft ]
		}
	    }
	}
	difference {
	    sphere {
		<0, 0, 0> 48.5
	    }
	    sphere {
		<0, 0, 0> 48
	    }
	    box {
		<-100, -100, -100>
		<   0,  100,    0>
	    }
	    texture { T_arkonstahl }
	}
    }