We would like to render explosions made in Houdini in XSI. The catch is it is 
Lego explosions, ie. the volumetric is represented by Lego bricks in colors 
derived from the heat data from the Houdini sim. It all works and renders fine 
in Houdini, but for pipeline issues we would like to move the geometry to XSI 
and render there. Problem is we have color attributes in Houdini which we need 
to transfer too.

We are thinking of using alembic as cache format, but we don't know how the 
color attributes should be written in Houdini nor how to read that in XSI.

Have any of you Houdini peeps done something similar or know which route to 
take?

Thanks!

best
Morten
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