When using the command Heightfield -
The fact is, it doesn’t use all that much memory, once the heightfield was created here Rhino only occupied about 600 Mb of RAM and the filesize saved was only about 8 megs. These days, that’s practically tiny.
I totally agree with the concept - offer to save the file before running the command - but I think the limits should be set higher is all…
–Mitch