How to create a 3D aperture inside PCB

The tool ribbon has a selection for board cutout that allows you to draw the shape.  Also, you can place a solid region on your board outline layer and then select it and make it into a board cutout. 

You will have to convert your placed objects into the outline of the shape you want.  Possibly do this by tracing the outline or by building the shape on a mechanical layer out of lines and arcs. 

Thank you Thomas!

I tried to make what you said me... but I don't understand how to make arcs...

I drew the outline (pink) and after I drew a region; into the arcs I taked the outline of region and I tried to stay on outline... It's correct?

Or there's another method?

Thank you Thomas!

I tried to make what you said me... but I don't understand how to make arcs...

I drew the outline (pink) and after I drew a region; into the arcs I taked the outline of region and I tried to stay on outline... It's correct?

Or there's another method?

Draw your shape on a mechanical layer (for example mech layer 21).

Place lines and arcs as needed to build the shape. Use a fine line width of 0.05mm or so.

It looks like you got that far.  If you can select the outline primitives you already made then maybe change them to another mechanical layer.  You don't have to but I think keeping the remnant lines and arcs off on the mechanical layer is better.

Next, select the primitives you drew.

Here is the trick....Next go to the search box and start to type convert create... and you should see a command to convert the primitives to a region.

This should make a region on the mechanical layer. You can move the region around you will still see the old lines and arcs.

Double click on the region to bring up its properties.

Change the layer to OUTLINE

Change the Kind from copper to board cutout.

Position it where you want it.

Look in 3D mode.

Here is a link to the manpage that describes regions.

Region | Online Documentation for Altium Products

It doesn't mention converting primitives to a region but it does show another way to draw arcs to define to outline of the region.  The way they describe may work also but I prefer to work with primitives that I can control dimensions of more easily.

Thank you very much!

You are my new IDOL!!!!!

I've done it!

Thank you.

I should add a few notes and suggestions to finish off this thread.

1) IMPORTANT! Be sure to add a keepout around the cutout region to prevent internal planes and other copper from getting too close to the edges of the cutout.

2) Another benefit of drawing the outline of the cutout region on a mechanical layer is you can add dimension lines and use it to make a mechanical drawing of the board shape.

3) Simple cutouts can use just holes and/or slots as a non-plated (or plated) feature instead of a region.