cannot add any modifiers?

[huntch3]

Hi

 

I made a terrain from multiple topo lines imported from cad, and then booleaned out some shapes with no problem, but then all of a sudden i tried adding another boolean modifier to cut another shape out and then the terrain just suddenly disapeared. I tried adding any type of modifier to the terrain and it always disapears when a modifier gets applied..any ideas? thanks

[luckymutt]

There sometimes seems to be wackiness involved with Booleans sometimes.

Use ProBoolean instead, for starters. It seems to give cleaner results.

Then try adding an EditPoly modifier before adding others.

[Ricardo Eloy]

Everytime you do a boolean, the object retains all the info involved in the operation. When doing complex operations one on top of another, the amount of info it has to retain is simply too large, so it kind of crashes. The best approach is to convert the geometry into an editable poly after each boolean, so the amount of info is kept as low as possible.

[amer abidi]

Everytime you do a boolean, the object retains all the info involved in the operation. When doing complex operations one on top of another, the amount of info it has to retain is simply too large, so it kind of crashes. The best approach is to convert the geometry into an editable poly after each boolean, so the amount of info is kept as low as possible.

 

i have found editable mesh friendlier to boolean operations than editable poly.

 

But either way, i only use boolean as a very last resort, and always try to limit it to one operation.

[anton]

As Amer is saying, definitely do all the boolean operations on an editable mesh. The editable poly will give you weird results most of the times. Then if you need to refine the mesh convert it to an editable poly.

 

Also after the boolean operations it's a good practice to manually cleanup the mesh. You might end up with verts attached to no faces or overlapping verts that need to be welded together. And for better results when converting to an editable poly, try and hide some of the visible edges in the mesh.

[Clanger]

Between operations give the mesh a quick STL Check to make sure nothings wrong.