https://forums.autodesk.com/t5/autocad-forum/unable-to-subtract-from-a-3d-solid/m-p/12636996#M19523 <P>Hi all, I am a new AutoCAD user, and I am having a lot of trouble trying to subtract 3D solids from another 3D solid, I am trying to subtract the grey objects from the red object. However, when i go to select to red object after clicking the subtract tool it says that it is not a 3D solid, even though the object tool tip says that it is a 3D solid.</P><P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="Screenshot 2024-03-12 234918.png" style="width: 600px;"><img src="https://forums.autodesk.com/t5/image/serverpage/image-id/1336485i268860934C0D6530/image-size/medium?v=v2&amp;px=400" role="button" title="Screenshot 2024-03-12 234918.png" alt="Screenshot 2024-03-12 234918.png" /></span></P><P> </P> Wed, 13 Mar 2024 06:56:01 GMT epiechWQ32L 2024-03-13T06:56:01Z https://forums.autodesk.com/t5/autocad-forum/unable-to-subtract-from-a-3d-solid/m-p/12636996#M19523 <P>Hi all, I am a new AutoCAD user, and I am having a lot of trouble trying to subtract 3D solids from another 3D solid, I am trying to subtract the grey objects from the red object. However, when i go to select to red object after clicking the subtract tool it says that it is not a 3D solid, even though the object tool tip says that it is a 3D solid.</P><P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="Screenshot 2024-03-12 234918.png" style="width: 600px;"><img src="https://forums.autodesk.com/t5/image/serverpage/image-id/1336485i268860934C0D6530/image-size/medium?v=v2&amp;px=400" role="button" title="Screenshot 2024-03-12 234918.png" alt="Screenshot 2024-03-12 234918.png" /></span></P><P> </P> Wed, 13 Mar 2024 06:56:01 GMT https://forums.autodesk.com/t5/autocad-forum/unable-to-subtract-from-a-3d-solid/m-p/12636996#M19523 epiechWQ32L 2024-03-13T06:56:01Z https://forums.autodesk.com/t5/autocad-forum/unable-to-subtract-from-a-3d-solid/m-p/12637162#M19524 <P><a href="https://forums.autodesk.com/t5/user/viewprofilepage/user-id/15193020">@epiechWQ32L</a>&nbsp;,</P><P>&nbsp;</P><P>Welcome to the forum!</P><P>&nbsp;</P><P>Post your drawing for all to troubleshoot.</P> Wed, 13 Mar 2024 08:37:01 GMT https://forums.autodesk.com/t5/autocad-forum/unable-to-subtract-from-a-3d-solid/m-p/12637162#M19524 Valentin_CAD 2024-03-13T08:37:01Z https://forums.autodesk.com/t5/autocad-forum/unable-to-subtract-from-a-3d-solid/m-p/12643349#M19525 <P><SPAN style="background: var(--ck-color-mention-background); color: var(--ck-color-mention-text);"><a href="https://forums.autodesk.com/t5/user/viewprofilepage/user-id/15193020">@epiechWQ32L</a></SPAN> Hello! &nbsp;Do you still need help with this?</P> Fri, 15 Mar 2024 14:56:48 GMT https://forums.autodesk.com/t5/autocad-forum/unable-to-subtract-from-a-3d-solid/m-p/12643349#M19525 CGBenner 2024-03-15T14:56:48Z