Here is the thing & a good point to show mem purge NOT working.

1. Load terrain - texture it(256x256 non procedural no displacement or bump) resources at 92%

2. move terrain - res. drop to 89%

3. add a water plane - res. stay the same

4. Add a poser item - rescources plummet to 64% Vue come to almost a halt not being able to move/rotate/scale etc etc efficiently

5. Delete the poser item & then purge memory - res. only recover to 66%

#5 being the most important clue here I should have recovered back to 89% the original scene minus the Poser item - but no. It did do this in Pre-Release 2nd to last patch.

I have undo's set to 1/background draw off/Stop keeping history at 70%.