https://forums.autodesk.com/t5/3ds-max-modeling-forum/booleans/m-p/10586259#M3372 <P>What's the end result? Nothing happens or does it look inverted?<BR /><BR />Generally issues with Booleans are due to objects not being manifold (not "watertight"). You can check by using the "STL&nbsp; Check" modifier.<BR /><BR /><BR /></P> <P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="STL_Check.png" style="width: 211px;"><img src="https://forums.autodesk.com/t5/image/serverpage/image-id/959173i0EC11686AFF75DFE/image-size/large?v=v2&amp;px=999" role="button" title="STL_Check.png" alt="STL_Check.png" /></span></P> Tue, 31 Aug 2021 02:59:43 GMT BenBisares 2021-08-31T02:59:43Z https://forums.autodesk.com/t5/3ds-max-modeling-forum/booleans/m-p/10581193#M3371 <P>I am trying to subtract an inner cone from a solid outer cone and cannot get it to work? Any suggestions would be great.</P> Sat, 28 Aug 2021 15:14:41 GMT https://forums.autodesk.com/t5/3ds-max-modeling-forum/booleans/m-p/10581193#M3371 Anonymous 2021-08-28T15:14:41Z https://forums.autodesk.com/t5/3ds-max-modeling-forum/booleans/m-p/10586259#M3372 <P>What's the end result? Nothing happens or does it look inverted?<BR /><BR />Generally issues with Booleans are due to objects not being manifold (not "watertight"). You can check by using the "STL&nbsp; Check" modifier.<BR /><BR /><BR /></P> <P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="STL_Check.png" style="width: 211px;"><img src="https://forums.autodesk.com/t5/image/serverpage/image-id/959173i0EC11686AFF75DFE/image-size/large?v=v2&amp;px=999" role="button" title="STL_Check.png" alt="STL_Check.png" /></span></P> Tue, 31 Aug 2021 02:59:43 GMT https://forums.autodesk.com/t5/3ds-max-modeling-forum/booleans/m-p/10586259#M3372 BenBisares 2021-08-31T02:59:43Z https://forums.autodesk.com/t5/3ds-max-modeling-forum/booleans/m-p/10587865#M3373 <P>Another approach for modeling the shape is to create a 2D line shape of half of a section cur of the "cone" and then use lathe to create the revolved shape.&nbsp; I think this might yield a cleaner model with the advantage of being able to adjust the number of segments in the circumference of the shape.</P><P>&nbsp;</P><P>&nbsp;</P><P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="image.png" style="width: 434px;"><img src="https://forums.autodesk.com/t5/image/serverpage/image-id/959412i01FE5F8D748D6E07/image-size/large?v=v2&amp;px=999" role="button" title="image.png" alt="image.png" /></span></P> Tue, 31 Aug 2021 15:51:46 GMT https://forums.autodesk.com/t5/3ds-max-modeling-forum/booleans/m-p/10587865#M3373 leeminardi 2021-08-31T15:51:46Z