Getting from an .STL to a solid I can use to split a body

[Anonymous]

Ok, so forgive me, but I'm somewhat new to 360.

Here's what I need to do. I need to work backwards from an .STL file (basically a length of an open-topped u-shaped pipe), and get it to the point of being able to be a solid that can be used to split a rectangular solid. It has too many triangles to directly convert to BRep, so first I close the mesh, then reduce to 49,999 faces. But I can't get from there to a point where I can select "pipe" as the object being used to split a body.

Any help?

[Johnc911]

You don't split a solid with another solid. You can boolean solids with Combine command.
But if you want to split, you have to use faces or planes or surfaces.

[Anonymous]

Basically I need to cut a gouge in this rectangular solid using this shape imported from an .STL file

[Johnc911 · Accepted solution]

See the screencast for how to do this

[Phil.E]

I wish the video for this class was included (as most Autodesk University classes are recorded). The handout paper does have a lot of information for your workflows.

https://www.autodesk.com/autodesk-university/class/Reverse-Engineering-Imported-Data-Fusion-360-2019