Alain wrote:
> Merge will only make your scene render slower.
> You may have areas where to many different components overlap. You may 
> need to take slices of your various individual components, by 
> intersecting them with properly sized boxes, and unioning those slices.

Alternately/similarly you could texture the whole object using one or 
more object patterned textures, so each texture is where you want it to be.

-- 
// The Mildly Infamous Blue Herring
#version 3.61;#include"functions.inc"global_settings{assumed_gamma
2.2}isosurface{function{-f_strophoid(x/2-.45,y,z*3,1,1.2,1,1.5)-.05}
contained_by{box{<-2.1,-1,-1/3>,<1.4,1,1/3>}}max_gradient 12inverse
hollow pigment{rgbf 1}interior{media{samples 8 emission<3,80,150>/255
density{crackle metric 1color_map{[0rgb 6][.03rgb 0][1rgb 0]}scale<1,
2,1>warp{turbulence<.5,.75,.5>}scale 1/3}}}translate z*3}

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