Hi there.
I am trying to pour water into a glass cup, but having problem due to the contacting point of water and glass.
So I want to delete the polygons of glass touching the water.
In other words, how can I delete polygons of one object that are within specified distance from other object.
Maybe simple question, but hope some kind advice.

Thanks in advance.

S. Lee

You can use a Ray SOP and Delete SOP for this.

The Ray SOP can find the closest surface for every point and store that value in a “dist” attribute. (You can tell the Ray SOP to not transform the points when it does this)

The Delete SOP can delete using a filter expression using $DIST as a threshold.

Depending on your geometry the Ray SOP might be slow, so you might want to use something like a Magnet SOP or AttribTransfer to make a soft tinting of the water's geometry and then delete based on that.

Thanks Jason.

Second option works very well.

I will also try the Ray Sop.

Sincerely,