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Boolean - leave solid polygons

Al Gay

Al Gay

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99
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canada
When one makes a hole completely through an object using Boolean is seems that some times the whole is solid polygons and other times it is a hole through the outside polygons of Operand A but it has no inner walls.

Is there something that controls this? I know there is a Cap Hole modifier but this does not always seem to have the proper results, depending on the shapes.

Any help would be appreciated.

Al
 
Not a setting but a model problem I suspect

[QUOTE=Al Gay;136579
Any help would be appreciated.

I have experimented further and find that it is not likely a setting GMax but the model itself. I placed a simple cylinder in the same scene and using Boolean, have made a proper concave cube in it without a problem.

At this point I don't know what the model problem is, so if anyone has run into this before, do you recall what may have caused it.

Cheers,

Al
 
I've learned to accept this as a max wierdness. I had it happen both in gmax and 3dsmax...just anytime you expect a hole and don't see one, go to vertex mode and look. Deleting polys is pretty easy.
 
Thanks Bob,

I was just trying to make sure I wasn't doing something wrong. I have since taken a previous save and the Boolean worked fine on it.

Cheers,

Al
 
Al,

From what I have noticed, this happens if you have deleted any faces from the object.

If you look at the pic I attached, the left cube had a face deleted (the base) prior to the boolean operation, while the right cube was left untouched (aside from converting to editable mesh).
 

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Hi,
from what I understood, if you want your final object manifold, ensure original object and boolean are manifold too
Cheers
 
ALain152 said:
Hi,
from what I understood, if you want your final object manifold, ensure original object and boolean are manifold too
Cheers
Click to expand...

Alain,

I am not aquainted with "manifold", in this context. Could you please explain it to me please.

Cheers,

Al Gay
Flight Ontario
 
I suspect the actual cause is more complicated than just whether the models are manifold or not.

I've had cases in which I do serial booleans, all works as expected....and then it starts....now I have to manually remove the unwanted polygon(s).
 
Al Gay said:
Alain,

I am not aquainted with "manifold", in this context. Could you please explain it to me please.
Click to expand...

Think "watertight," as in a sealed container. The object has NO open faces at all.
 
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