[10bulls]

Hello there Robin

It should indeed cut an injection cavity. You can do a front and a back mould and if you include a cylinder surface in appropriate places it should do sprues toos.

Now for the buts...

I will say that 3D is not CamBam's strongest feature at the moment. It is usable but needs some refinements to make it more useful and easier to use. The bulk of CamBam development and testing to date has gone into improving the 2.5D functionality but 3D improvements are planned soon.

Biggest problem is, it is not yet using plane slicing for toolpath generation (despite cow mutilation ability). It is using a Z roughing approach... a lot like heightmaps... which means if you are doing small depth cuts per pass (as you'd need to do in hard material), the toolpath is very inefficient. This can be alleviated by using a big fat end mill and large stepovers (and a hefty roughing clearance) for the roughing passes. And yes, you can then create another finishing pass and select a tiny ballnose to get a better finish.
For finishing passes the z-roughing is not such an issue.

The other thing I need to work on is usability. Setting the clipping volume to something other than the default bounding box can involve doing some maths which is always to avoided. Easier property dialogs and more tutorials and examples are also needed.

Both these issues are being worked on for the next major release, so 3D will be improving soon. The latest development release now uses a much faster OpenGL drawing view which makes working with meshes much nicer.

So purchases of said ludicrously cheap licenses are always welcome, but please don't be upset if the 3D 'clunky factor' is a little high at present.
CamBam licenses are for the life of the product and will entitle you to free bug fixes and upgrades so will also work with better 3D releases.

I hope all that doesn't put you off too much but I thought I should give you some warning.

Attached is a sneaky peak at the next development release which should be out in the coming few days. This shows a 100k face model in the new OpenGL drawing view.

BTW Hows that big gun of yours... have you unbunged it yet?