I’m a complete beginner to SketchUp and am having issues with shapes being split into triangles. I’ve worked my way through some tutorials and am aware of the need to group items and of Hidden Geometry view option. Knowing these things is not helping. I’ve also searched on this forum, and whilst I can see other people are having similar issues, I haven’t found a solution to the problem I am experiencing.
What I am trying to create are two halves of a form that could them be used to make a mould that fit together. The below image should give you an idea of what I am trying to do. The bottom half is made of 5 shapes, the top should only be 6. As you can see the shapes on top have extra triangles that I don’t want:
I’m starting by building my shape as a flat form in the plan template. This is the flat form for the top half:
Using the move tool, I’m then moving each edge up the blue (z) axis. Regardless of whether I select to move on the edge or midpoint SketchUp is automatically splitting the trapezoid shapes into two triangles:
If I select Hidden Geometry view it shows me nothing, and group at this point won’t help as it will prevent me moving the shapes up like this (as far as I can tell). Is coplanar something I need to be thinking about? I’ve had a quick look but don’t understand it very much and thought that if the shape came up with the grey colouring it was coplanar?
Any help would be greatly appreciated. Thanks.