Raytracing functions support "subs...

[Eric Hochhalter]

In PRMan one can use an optional parameter to raytracing RSL functions:

    "subset",  traceSet

This then limits the scope of the raytrace only to those meshes in the RIB that belong to the specified set. This is a huge benefit in that it is a simple workflow for optimizing render times by limiting raytracing to only the meshes that absolutely need to be traced.

The RenderMan Artist Tools documentation descripes this parameter thusly:

> "Specifies which objects to consider
> in  the trace.  When no value is
> provided, the trace set defaults to
> the value specified in the RIB  stream
> via the 'tracesubset' grouping
> attribute."

**Does Pixie support this or a similar parameter?**

If not, I suppose I can get clever with my RSL, but I find the subset workflow much more flexible and preferable, and would highly recommend it for future releases.

How have others addressed this issue in Pixie?

[Okan Arikan]

Unfortunately Pixie does not support this yet, but it is a good idea to have it in the next release.

Okan