boolean subtraction problem...

hockley91 · July 9th, 2003

This is probably a silly question.

Okay, when I bring my plines from Autocad into Max, extrude them and then boolean subtract window/door openings from them, I always get a tesselation problem. Lines appear at corners after I perform the operation. I know I can get around that by not subtracting and create the geometries around the openings, but is there a way to boolean subtract without having this tesselation problem?

Thanks!

Alex Ryan Rubio · July 9th, 2003

try converting objects you subtract doors and window objects from, to editable meshes before applying boolean operations. do this repeatedly before each operateion. this usually works for me.

hockley91 · July 10th, 2003

Well, I tried to do that and I keep getting the same tesselation lines appearing on the geometry.
The shape I used has no subdivisions in it, and when I subtract from it, the lines appear....

What to do....

Martin H · July 10th, 2003

Are you talking about the creation of long thin faces that then show up on the modified surface as lines when rendered?

If so, it may be the same issue I have faced with Shapemerge. What I have done to solve the problem is subdivide the surface prior to performing the shapemerge, or in your case the boolean subtraction.

Try adding a subdivide modifier to your wall prior to the boolean subtraction and see if it doesn't solve the problem.

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July 9th, 2003	#1 (permalink)
hockley91 Senior Member Join Date: Oct 2002 Location: Texas Age: 35 Posts: 211 Name: Adam Hockley	This is probably a silly question. Okay, when I bring my plines from Autocad into Max, extrude them and then boolean subtract window/door openings from them, I always get a tesselation problem. Lines appear at corners after I perform the operation. I know I can get around that by not subtracting and create the geometries around the openings, but is there a way to boolean subtract without having this tesselation problem? Thanks!

July 9th, 2003	#2 (permalink)
Alex Ryan Rubio Member Join Date: May 2003 Location: Philippines Posts: 87 Name: Alex Ryan Rubio	try converting objects you subtract doors and window objects from, to editable meshes before applying boolean operations. do this repeatedly before each operateion. this usually works for me.

July 10th, 2003	#3 (permalink)
hockley91 Senior Member Join Date: Oct 2002 Location: Texas Age: 35 Posts: 211 Name: Adam Hockley	Well, I tried to do that and I keep getting the same tesselation lines appearing on the geometry. The shape I used has no subdivisions in it, and when I subtract from it, the lines appear.... What to do....

July 10th, 2003	#4 (permalink)
Martin H Junior Member Join Date: Jul 2003 Location: Los Angeles Posts: 1 Name: Martin Herkenhoff	Are you talking about the creation of long thin faces that then show up on the modified surface as lines when rendered? If so, it may be the same issue I have faced with Shapemerge. What I have done to solve the problem is subdivide the surface prior to performing the shapemerge, or in your case the boolean subtraction. Try adding a subdivide modifier to your wall prior to the boolean subtraction and see if it doesn't solve the problem.

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