Hi,

I wonder if anyone can help me, I'm trying to create an isosurface which from
above will be shaped as a T. My first idea was to do a rectangle and then cut
off the bits I didn't want with a difference{} but this still calculates the
whole isosurface which seems inefficient. My next plan was to have 2 isosurface
with the same function to create the T shape. The problem is, I need the
isosurface to reflect/refract and allow light to pass through it. My
understanding is that instead of union{}ing the 2 isosurfaces, I simply needed
to merge{} them - but unfortunately, thsi leaves strange artifacts visible
(vertical black lines) I've tried overlapping the 2 isosurfaces in case it was
due to a rounding error on the boundary to no effect. I've increased max_trace
by an order of magnitude which hasn't helped either.

Can someone please point me in the right direction?

Thanks in advance,

Basiclife

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