Bill Pragnell wrote:
> 
> From the documentation:
> 
> "The actual ambient used is: Ambient = Finish_Ambient * Global_Ambient."
> 
> So if you set global ambient = 0 then it will work fine. If you want nonzero
> ambient light then it's better to use the #default finish { } and only
> specify the ambient values you want to override.
> 

Something that's sometimes useful is to give each object's finish some 
ambient value that will look OK for test renders (ambient 0.3 works 
pretty well).  If you then set the global ambient value to 0 for a 
radiosity render, the ambient value for the objects' textures will 
revert to 0.  If you need something in the final scene to have a 
non-zero ambient (for example, a glowing LED), set its ambient really 
high and then set the global ambient to something like 0.001, which will 
effectively kill the ambient in the other textures.

Hope that's slightly useful...

--Sherry Shaw


-- 
#macro T(E,N)sphere{x,.4rotate z*E*60translate y*N pigment{wrinkles scale
.3}finish{ambient 1}}#end#local I=0;#while(I<5)T(I,1)T(1-I,-1)#local I=I+
1;#end camera{location-5*z}plane{z,37 pigment{granite color_map{[.7rgb 0]
[1rgb 1]}}finish{ambient 2}}//                                   TenMoons

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