Surface Volume Test Explanation

[leejk]

I am using surface test (volume inside and outside), all the time, and never had any issues.
2 things that crossed my mind:
1) Is your volume object closed mesh? If not. Try making it closed... add a cap holes modifier, or model primitive (closed) version of the model to use for a surface test.
2) Double check that surface test operator timing is set to continuous (should be by default.. but no harm in checking)

Hello,

Yes, that was it, it was not a closed mesh. The other issue was that I was making my graph more complicated than it needed to be... finally got it working late today and rendering it out now.

thx