Is there a possibility to create a group with points which attribute has certain value? For example I apply a paint SOP on a geometry, it returns Cd attribute. I'd like to create a group of points which Cd is between this and that.
I think it is possible but I don't have an idea how to do it. Place an expression into group channel? Can I access attribute values in expressions? Or maybe some VEX thing.
I got it, $CR is point red color but I wanted any attribute. Thanks for the suggestion though. I digged in the expression cookbook to find the “point” expression, it lets get any attribute from any SOP. How great!
It may also be worthwhile having a look at the Partition SOP. With it you can effectively convert attributes to groups. The arrow next to the rule field has a few examples of how it is used.