"Juergen" <nomail@nomail> wrote:

> For test purposes, I want to see two explosions... As long as only the
> first explosion is visible, I don't see anything.
> Only when the second explosion is visible, the first one is also visible.
> Render with "-k350" for an incorrect image (one explosion), with "-k400" for a
> correct image (two explosions).
>

I am still trying to understand how your macro works with the two different -k
clock values-- but if I add an additional 'hollow' keyword at the end of the
union, inside the macro, like this...

....
#else
    sphere { 1E-10, 1E10 }
hollow
#end
} // [end of union]
#end // [end of macro]

.... the first explosion(?) does appear at -k350, and both explosions appear at
-k400

Is this the visual result that you are trying to produce?

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