So, I’m trying to cut out this Aqueduct along the landscape but when I try to use the Boolean modifier or the Knife Project I get this
When using Boolean: Cannot execute boolean operation
When using Knife Project: No other selected objects found to use for projection
Any help would be greatly appreciated!
Knife project is not the tool for this.
For boolean ensure your mesh is water tight and has no non manifold edges etc
Or just have the objects intersect
No .blend file supplied so we can’t give specific answer
After testing boolean with only one of the arches and getting the same error, I’m fairly certain now it’s the way I built the arch, which confuses me cause I can’t figure out (maybe I’m not looking at it right) where on the actual object I went wrong. I’ll put the .blend below, maybe you can see something I can’t.
Thanks!
(Also, a little side note. I’m going to be 3D printing the Aqueduct so if you happen to have any knowledge about that sort of thing and you sort of see a red blaring light with my model, feel free to tell me too).
Your Arch has not applied scale, has inconsistent normals, ngons and it’s constructed as a non manifold mesh in where it stacks. Boolean operations do not work due to this.
Boolean difference would work on object with ngons as in example; opening shape was taken from your model and modified using arrays and convert to curve and back.
http://wikisend.com/download/880354/Aqueduct1.blend
Using another Boolean operation you could do inside then:
http://www.pasteall.org/pic/show.php?id=102241
It worked! Thank you so much for the help. And the new model is actually better for 3D printing, so we sort of killed two birds with one stone with that one.
