Hi Simon and David,

I noticed your thread on planetary renderings, and I'm
interested in this, too. I have a friends who's writing a
game and he asked me to render some planets for him.

I was looking through _The Science of Fractal Images_ by
Pietgen and Saupe, and In the color plates I saw a cosine-offset
surface generation method used by R.F. Voss. I looked at that
for a while and realized I could code something like that in 
Perl and make a pgm output file and use that as a bump_map
on a sphere.

However, when I try to render it, I don't see any bumps
on the sphere. Do you see anything erroneous about this
bump map statement?

#declare PLANET=sphere { <0, 0, 0>, 1

	normal { 
		bump_map {
			pgm "surfaces/jbrp.1.pgm"
			bump_size 10.0
			map_type 2
		}
	}
	
	pigment {
		Gray
		//image_map {
		//	pgm "surfaces/jbrp.0.pgm"
		//	map_type 1
		//	interpolate 2
		//}
	}
	scale 6
	translate <0, 4, 0>
}


If that is correct, could you suggest anyother reason
I might not be able to display bumps on the sphere?

Attached is my surface map. Would you mind taking a look 
at it?

Much appreciated

--jed



Simon de Vet wrote:
> 
> I've found tons of great heightmaps for planets, and moons at
> http://bang.lanl.gov/solarsys/eng/homepage.htm




-- 
# Jed Reynolds, mailto:jed### [at] surfsoftcom http://www.surfsoft.com/~jed
# "...I've seen the old geeks talk to the young geeks, and they speak
# the same language. There's no age gap or anything." --Steve Wozniak

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