So I went through Peter's cool tutorial at:

http://www.sidefx.com/images/stories/tutorials/spring_sop/4.chops_animation_curve.mov [sidefx.com]

which extracts a curve from a NURBs surface and uses CHOPs to animate a sphere along it.

I figured this would be an interesting thing to expand to an arbitrary number of curves and spheres using the ForEach SOP, but it doesn't seem to work. Basically when I put the CHOPnet into the ForEach SOP it only seems to cook the CHOPnet for the first iteration, meaning all the spheres are moved along the first curve only.

If I do the exact same setup but use a “point” expression in the subnet to animate the spheres, rather than an exported CHOPs channel, it works great. See attached file.

Am I doing something wrong? Should this work?

Thanks

I'm using apprentice version 8.1.655, and I believe I just ran into the same bug with the irradiance VOP. It's just a typo, but the generated vex code should be providing a value for the “environment” parameter, not “envmap”.