I tried to stamp a house on a terrain but the Stamp tool did did not work as expected: it created a hole on the terrain following the outline of the house and nothing else.
For what it is worth, the terrain was generated by FredoTools and I tried to stamp a simple block that has the same contour as the house. I tried several times, changing some of the aspects of the situation: no terrain skirt, actual house instead of just a block, etc. Nothing works.
Any ideas?
Can you make a screen record and share it? I haven’t used sandbox tools in a while so I’m not sure if the stamp or drape tools work with terrains made with other tool instead of the native tool to generate the terrain. Have you tried that way? Generating a terrain using the from contours tool then try to stamp.
It works as expected in SU 2022 and SU 2026, with a model I created using TopoShaper.
How exactly is your terrain created (group, nested groups, etc.)? What are its dimensions?
Is the terrain positioned at a very great distance from the origin?
What else is different in that file?
You should upload the model otherwise we will just be guessing why it doesn’t work.
Here is the model. Thanks!
stamp-test.skp (5.7 MB)
I was looking at your model and found the same issues as @mihai.s but he beat me to it. I also note incorrect tag usage.
Hi Dave, what do you mean by incorrect tag usage? I may as well learn something from this.
All edges and faces should be created and remain untagged. You should only be giving tags to groups and components. You can easily end up with all sorts of problems when the edges and faces are tagged. A common issue is creating new geometry that winds up merging unexpectedly with existing geometry. Unexpected when the user has the tag turned off. Another common issue it winding up with edges and faces disappearing when you don’t want them to. I ran TIG’s Default Tag Geometry on your model and got this.
Thanks, Dave. I did not do the whole model. When it came to me, there was already the terrain and the stone wall. But from now on I will run this extension every time I inherit a model.
I think that’s a good idea.
There’s another thing to keep in mind. If you explode a tagged group or component, whatever is inside will inherit the tag. That can be OK if you have nested objects like you do in your building group. Exploding the top level group will give the tag to the groups and components inside. That can be very powerful. If you explode a tagged group to raw geometry, though, the edges and faces will inherit the tag. If you don’t catch that right away you can create trouble. Immediately after exploding an object to raw geometry the edges and faces will be selected. Before doing anything else, go to Entity Info and change Tag to Untagged. Or run TIG’s extension on your model. 
Thanks for this and for continuing help along the years. One never ceases to learn. Sketchup is deceptively simple, some of its quirks can only be learned with experience.
Edson
