Getting strange displacement results

Newtek Lightwave 3D (exporter developed by holocube, Integrated Plugin developed by juanjgon)

Moderator: juanjgon

Post Reply
mikefrisk
Licensed Customer
Posts: 172
Joined: Fri Aug 29, 2014 9:17 pm

I have a displacement map i've made.

Image

and I have a scene i've comiled of a concrete floor

Image

The concrete is smooth and the displacement map has a mid point of 50% gray. However, when I apply the displacement map to my geometry I get extra noise all over.

Image

I can't figure it out, the image has no noise in it whatsoever.
mikefrisk
Licensed Customer
Posts: 172
Joined: Fri Aug 29, 2014 9:17 pm

I figured it out;

Allthough I rendered my image as a PNG with no compression it was displaying some minor artifacts. I rendered as a PSD and the noise went away.
User avatar
juanjgon
Octane Plugin Developer
Posts: 8867
Joined: Tue Jan 19, 2010 12:01 pm
Location: Spain

Are you using the attached image for the displacement? It seems to have a lot of noise! ... but even if you are using a not JPG version, the JPG compression artifacts shows that the original image should have some kind of noise on it.

Thanks,
-Juanjo
mikefrisk
Licensed Customer
Posts: 172
Joined: Fri Aug 29, 2014 9:17 pm

juanjgon wrote:Are you using the attached image for the displacement? It seems to have a lot of noise! ... but even if you are using a not JPG version, the JPG compression artifacts shows that the original image should have some kind of noise on it.

Thanks,
-Juanjo

Yeah, i feel silly. It works as a PSD.
User avatar
juanjgon
Octane Plugin Developer
Posts: 8867
Joined: Tue Jan 19, 2010 12:01 pm
Location: Spain

Ah, OK. Yes, this could be the issue. No problem ;)

Thanks,
-Juanjo
User avatar
kopperdrake
Licensed Customer
Posts: 24
Joined: Mon Mar 27, 2017 9:42 pm
Location: Derbyshire, UK
Contact:

I'm not sure what you've used to create the 50% grey, but there's some variation in your grey values which is causing the displacement issues you're seeing. If you've saved it as a jpeg, which it looks like you have, then it's corrupted your colours as you have chunked data, visible as squares if you select a very narrow range of colours in your image editor. You need to save as a png or other lossless format.

Try this one out instead http://www.mediafire.com/file/tnq3vy7na ... cement.png
- web: http://www.albino-igil.co.uk - 2D/3D Design Studio -
- PC Spec: Intel i9-7940X @3.1GHz | 64Gb | 3 x GeForce RTX 3080 Ti & 1 x GeForce RTX 2080 Ti | Windows 10 Pro 64-bit -
User avatar
kopperdrake
Licensed Customer
Posts: 24
Joined: Mon Mar 27, 2017 9:42 pm
Location: Derbyshire, UK
Contact:

Oops - beaten to it :D
- web: http://www.albino-igil.co.uk - 2D/3D Design Studio -
- PC Spec: Intel i9-7940X @3.1GHz | 64Gb | 3 x GeForce RTX 3080 Ti & 1 x GeForce RTX 2080 Ti | Windows 10 Pro 64-bit -
User avatar
acc24ex
Licensed Customer
Posts: 1481
Joined: Fri Mar 19, 2010 10:58 pm
Location: Croatia
Contact:

BTW apparently octane likes displacements in 16 bit then you get smoother transitions where there are gradients etc.
User avatar
promity
Licensed Customer
Posts: 363
Joined: Sun Dec 19, 2010 7:59 am
Location: Russia

I'm working on an underwater scene. I have only a few objects - the plane of the sea floor and the submarine. I want to add displacement to the seabed. But whatever I tried to do in this direction, I can not do anything. I open the demo scene with the displacement and everything works fine. But if I import this scene into my own scene, nothing happens again.
Well, i found solution - just a question related to scale of textures. My sea floor model 1km in radius. In this regard UV map created huge scale for textures.
AMD Threadripper 1950X/64gb ram/RTX 3080 Ti + RTX 2070/Samsung SSD 870 EVO 500 gb/
Lightwave 3d
Post Reply

Return to “Lightwave 3D”