Cant render with displacement enabled and itoo forest..

Corona Corona for 3ds Max Help Required
1

Hi, I have a not too big scene with a big problem.. I cant render it using displacement if i have the forest on. WILL eat 128gb of ram..
All the terrain has a corona layer material with displacement (composite displacement and masks)
The scene only has the terrain and the forest objects

Scenario were it works:
Displacement on, terrain isolated OK
Displacement on, all the itoo forest objects Isolated OK
Displacement on, all the itoo forest objects WITH a different surface terrain that the one with displacement OK

Scenario NOT working:
Displacement on, terrain and forest objects visible NOT working

Corona 9.1
Max 23.3
Ryzen 7950x 128gb Ram

2

Hi,

Are you using screen or world displacement here?

I would suggest that you increase your displacement size, as setting it too low could cause high RAM consumption.

Cheers,

Rowan

3

Hi, im using screen size of 15. But the ram usage keeps going to 100% (128gb)

4

Are you by any chance rendering from an orthographic camera? If yes, then try switching to regular perspective mode.

5

Two more questions:

  • your objects scattered with Forest - are they using a material with displacement?
  • your objects scattered with Forest - are they using a multi/sub material?
6

Hi, Yes my objects are scattered with Itooforest, those objects Dont have displacement, yes they have a Multi/sub material. (most of them are trees and shurbs form maxtree)

7

After countless hours trying to solve the problem the culprit was a corona Decal, is a big decal covering the terrain with an opacity map that only shows a path were i want the decals to show. The problem i think is that the decal that has displacement in it is computing the whole project… So no decal and extra detail for this time!

8

I may not understand 100% - could this because the decal was getting applied to the scattered trees too, since it affects all objects it overlaps/intersects? If you set the decal to have an Include list and only affect the terrain, does that help?

9

Hi!

I had the same problem and excluding the Forest objects from the decals didn’t worked out.
I’ve found that in any conditions, the mix of Forest + Decals on them is a kill.

Thanks,

Dionysios -

10

Hi @Dionysios.TS @arqrenderz

is it possible for either of you to send us a ticket along with a simplified version of your scene and some repro steps so we can investigate the issue further?

You can start a ticket with us using this link: https://support.chaos.com/hc/en-us/requests/new

11

Sure, I need to finish a job first (a day or two) and then I’ll be back with the ticket and a file example if is necessary.

Dionysios -