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[sprayer]

Yes it's noticeable but i am telling what both images do not suit for close rendering, you can see blurriness on 16bit and terrace on 8bit, but for distant view about 2meter you do not notice this difference, that's what i am telling.
I am not sure what your map between 0-255

And yes it's strange what both image have the same amount of polygons, black magic from Ondra i guess)

[romullus]

Ok, at this point i see there's no chance to convince you that 8bit textures for displacement, is a bad idea, so i give up.

And yes it's strange what both image have the same amount of polygons, black magic from Ondra i guess)

Strange? I don't think so. It would be magic, if polygon count would depend from texture. A white magic! :]

[sprayer]

I am store 16bit maps) but for optimization i was have to convert them in 8bit in scene project, we discussing here optimization right? =)

But still we can't to render in corona like this =)

[romullus]

You don't have to convince me about importance of optimization, i have 6 years old computer with 16GB RAM, so i'm quite familiar with situation when scene doesn't fit into RAM :] But i think it's quite important to optimize in smart way. In this case lowering texture's resolution would be smart optimization, as it makes very little visual difference to the end result. On the other hand, lowering bit depth, would be... aaa, just optimization.

P.S. not sure what that video has to do with our discussion, but why are you so sure that Corona can't render 20M trees?

[maru]

P.S. not sure what that video has to do with our discussion, but why are you so sure that Corona can't render 20M trees?

¯\_(ツ)_/¯

[sprayer]

On video guy was used 32gb, so it matter of your pc config, but corona have not implemented out-of-core feature and only present generation of motherboards can handle 64gb i mean desktop section (i7 and ryzen what most common workstation), i have older i7 and it's maximum only 32gb, so we with Romulus can't render 20kk trees =)

[romullus]

so we with Romulus can't render 20kk trees =)

I guess it's only you, because i managed to render 20M trees :P Ok, i had to attach 3 trees in to one, like in the video, but hey, i only have 16 Gigs. I even tried to render 20 millions without cheating, obviously 3ds Max ran out of RAM, almost every open program has crashed, but Max and Corona heroicly went through and after 8 minutes of parsing and geometry preparation phase, rendering has started, but for some odd reason Corona scatter decided to cheat and gave me only 17,5M trees, so i think, we can't qualify that as valid result.

[maru]

Yeah, the guy in the video optimized RAM by attaching multiple tree models together. This is a common workflow. I didn't do this, that's why RAM struggled. :)
32 GB of RAM used to be a standard some time ago. Now it's definitely closer to 64, and it is common to see workstations with 96 GB and more. Also, RAM is really cheap now.

[M_SON]

Yeah, the guy in the video optimized RAM by attaching multiple tree models together. This is a common workflow. I didn't do this, that's why RAM struggled. :)
32 GB of RAM used to be a standard some time ago. Now it's definitely closer to 64, and it is common to see workstations with 96 GB and more. Also, RAM is really cheap now.

thanks maru, i'll go for another 32gb, seems to be more and more difficult to work only with 32gb