octane 4.02.1-R3 - crashes when renders to PV, RQ works fine

[silkyre6xtenz]

I have seen a lot of posts when octane crashes when the scene is rendered ti render queue... I have the opposite case - when i render my scene to picture viewer, the render is very slow (i mean slow initialization). After 5 minutes of initialization, it consumes all system RAM and then crashes. When i render the scene to render queue - everything renders fine - RAM usage never exceeds 60%...
I am using octane 4.02.1-R3, GTX1070Ti, 16gb RAM...
Yeah, 16gbs is not that big, but it looks like the problem isnt RAM - in render queue everything renders fine. I have also tried to destroy all Forester parametric grass and trees in the scene - crashes when rendering to PV still persists...

[silkyre6xtenz]

UPDATE:
NO crash at all when all FOrester objects are made editable.
It looks lica octane uses too much RAM when forester parametric primitives are scattered...
I am not that proffessional to figure out should it be this way or not, but 2018.1 and 4.02.1-R3 render everything fine when forester trees and grass are editable.
Cheers, silkyre6xtenz

[aoktar]

Be aware of different triangle counts of generator objects LV vs. PV. It's same as Editor vs. Render different.
Also try to use render-instances or multi-instances if possible, it will decrease triangle and object counts in total.