Lutz-Peter Hooge <lpv### [at] gmxde> wrote:
: When a ray first enters an object of, say ior 1.5, and then one with ior 
: 1.3 (without leaving the first object), is that IOR than regarded 
: relative to the containing object, or absolute?
: And, when the ray than leaves the second object, does it "remember" that 
: the outside has ior 1.5?

  AFAIK povray always remembers what is the current ior of the space the
current ray is travelling.

-- 
#macro N(D)#if(D>99)cylinder{M()#local D=div(D,104);M().5,2pigment{rgb M()}}
N(D)#end#end#macro M()<mod(D,13)-6mod(div(D,13)8)-3,10>#end blob{
N(11117333955)N(4254934330)N(3900569407)N(7382340)N(3358)N(970)}//  - Warp -

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