Displacement issue (problem)

[tradstown]

OK. So do you use the 32k map as a hightmap for the hole area like it's done in a game engine? If so, then I wouldn't use Corona displacement for this, but either 3dsMax displacement Modifier or some sort of vertex displacement (depending on the mesh structure).

Regarding the tiled 3x3m map, it's likely to small to be seen from 1 km or more.

Thank you for advise!

About little displacement: look at the images I uploaded in this topic please. You will see, that we will see some details of this little displacement on the middle distance, but it is very blurred because of the displacement

[PROH]

What denoiser are you using, and how is your bump and autobump set up?

[tradstown]

What denoiser are you using, and how is your bump and autobump set up?

It doesn't matter in this case. I need geometry displace. Autobamp has no setup, it is only on or off. There is no bump in the material and I don't use the denoiser

[PROH]

Sorry for the wording. Is autobumb on or of?

[tradstown]

Sorry for the wording. Is autobumb on or of?

That's fine. It is On.

[PROH]

OK. Now I have done some testing myself, and can confirm that displacement on large scale is problematic with Corona.

My test was designed to see how far away you can see displacement sized around 20-25 cm, and in both 4k and 6k renderings I could still see it at 1km distance, even with the denoiser on (Corona). Pictures attached.

But at 8k the problems begin. There is lots of artifacts in the render, and Corona gives a warning about low RAM (I only got 64Gb). Low RAM however should only cause a slow render, and NOT give artifacts.
I have tried to locate the problem, and one thing I noticed is, that when the "Primitives displac." number goes higher than 1.000 M I start to have artifacts.

Hope it helps.

[tradstown]

OK. Now I have done some testing myself, and can confirm that displacement on large scale is problematic with Corona.

My test was designed to see how far away you can see displacement sized around 20-25 cm, and in both 4k and 6k renderings I could still see it at 1km distance, even with the denoiser on (Corona). Pictures attached.

But at 8k the problems begin. There is lots of artifacts in the render, and Corona gives a warning about low RAM (I only got 64Gb). Low RAM however should only cause a slow render, and NOT give artifacts.
I have tried to locate the problem, and one thing I noticed is, that when the "Primitives displac." number goes higher than 1.000 M I start to have artifacts.

Hope it helps.

Hello! Wow, great test! Hope it will help to improve displacement in Corona Renderer and it will help to fix some bugs.

[romullus]

Nice test. Maybe there's a hard limit on overall displacement primitives count?

[GeorgeK]

Thanks everyone, great testing @PROH, I'll be reporting this and we will investigate further, please stay posted for further information.

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[rowmanns]

@PROH
The issue you reported is now fixed.

You will no longer get artifacts in this case. At 8k it renders correctly now :)

If you exceed the maximum limited primitives you will get an error message too.

You can grab it here: https://forum.corona-renderer.com/index.php?topic=36810.msg203090#msg203090

Thanks,

Rowan

[tradstown]

@PROH
The issue you reported is now fixed.

You will no longer get artifacts in this case. At 8k it renders correctly now :)

If you exceed the maximum limited primitives you will get an error message too.

You can grab it here: https://forum.corona-renderer.com/index.php?topic=36810.msg203090#msg203090

Thanks,

Rowan

Hello Rowan!
This is great news! Also I wanted to ask you about World Sizes type of displacement, is it works fine too?
Also this mistake was with small resolution as well. You can check this image please:

[rowmanns]

Hello Rowan!
This is great news! Also I wanted to ask you about World Sizes type of displacement, is it works fine too?
Also this mistake was with small resolution as well. You can check this image please:

Hi,

Did you send this scene over to us already? If not can you send it over to me? I can send you a link via PM to directly upload the scene to me.

Cheers,

Rowan

[tradstown]

Hello Rowan!
This is great news! Also I wanted to ask you about World Sizes type of displacement, is it works fine too?
Also this mistake was with small resolution as well. You can check this image please:

Hi,

Did you send this scene over to us already? If not can you send it over to me? I can send you a link via PM to directly upload the scene to me.

Cheers,

Rowan

Hello! Yes, I did.