I think a very simple solid problem involving holes

Using Sketchup Shop. Intermediate user. Trying to do a follow me function BUT my solids are giving me trouble. If I create a circle and then make it a group and run the solid inspector, it finds issues. A circle I just created using the circle tool, has a border hole in it. I can paint it and fill it with a color, so I don’t think it has any holes. If I push the surface in the littlest amount and group it, then it’s OK. As far as I know, I shouldn’t have to push a surface to make it a solid. I tried to make a rectangle and it also has a border hole.

How about sharing the .skp file so we can see what you have?

Joined 30 minutes ago, would attachments work yet?

I give up. You can help.

@thomthom - Should solid inspector give an alert to say that the object is infinitely thin, and so could not possibly be a solid?

Alpha3, like you discovered, give the circle some thickness.

I think any single face violates the rule that every edge must be used by exactly two faces for an object to be a solid.

Very new to this forum (today) and can’t see how to attach a file. Simply I use the circle or rectangle tool to draw a circle or rectangle - make it a group - run solid inspector - it tells me it’s not a solid and has it found - Border Holes (1) . If you create an outline of some sort you want to use follow me with you should just be able to create a circle for it to follow. I shouldn’t have to push it in order to make it a solid should I?

After you do any push/pull or follow me, it is likely to be a solid. Before you do those things there isn’t anything in the group that is a solid.

What is your use case where you want an infinitely thin circle to be seen as a solid?

Ofcourse it can’ t be a SketchUp Solid as has been said before by others. You have a single face with no thickness. You can’t change the rules.

A surface border (aka Border Hole) is a set of edges that create a hole joining the interior and the exterior of a solid. A solid must fully separate its interior from its exterior by means of a completely closed surface. The ideas of “interior” and “exterior” have no meaning for a 2D object because it can’t enclose anything.