Hi Sebastian, yes running out of RAM can be a problem, that will finally be solved with v4.

If you are working on heavy models currently, it can help to adjust the display mesh density to be looser, that will cut down on memory consumption by quite a bit. To do that, go to Options > View > "Meshing parameters" (at the top), and set "Mesh angle" to a looser angle like 25 degrees and uncheck "Add detail to inflections".

That will make for a somewhat rougher looking shaded surface display but also consume a lot less memory.

- Michael