Chaos Corona Forum

Chaos Corona for 3ds Max => [Max] Bug Reporting => [Max] Resolved Bugs => Topic started by: Seabass on 2015-09-16, 15:51:58

Title: Problem in displacement
Post by: Seabass on 2015-09-16, 15:51:58

Please help me with an error. Is there a problem with displacement.
That's what happens when displacement is on.
What is the problem?

Title: Re: Problem in displacement
Post by: maru on 2015-09-16, 16:12:31

Hi, which version of Corona are you using? Where is the displacement applied?

Title: Re: Problem in displacement
Post by: Seabass on 2015-09-16, 16:18:01

Corona 1.2.1

Title: Re: Problem in displacement
Post by: johan belmans on 2015-09-17, 19:26:16

I guess you used PT + UHD cache.
Try it with PT +PT

Title: Re: Problem in displacement
Post by: Seabass on 2015-09-18, 08:39:42

Yeah... I will try. But maybe it's a bug?

Title: Re: Problem in displacement
Post by: romullus on 2015-09-18, 08:56:31

It could be. But first make sure that your system units and displacement strength are correct. What Corona build you're using?

Title: Re: Problem in displacement
Post by: Seabass on 2015-09-18, 09:47:27

Corona 1.2.1 System Units - mm? level displacement min - 0, max -20mm

Title: Re: Problem in displacement
Post by: romullus on 2015-09-18, 12:28:18

Nothing unusual here, i'm moving this topic to bug report.

Displacement has seen some fixes recently. It can be that your issue is already fixed. Can you try to render this scene with daily builds?  https://coronarenderer.freshdesk.com/support/solutions/articles/5000570015

Title: Re: Problem in displacement
Post by: Nekrobul on 2015-09-19, 20:09:56

I know this problem. Most probably it is boolean geometry.

For example you have a line extruded and with adit poly on it, then you add pro boolean and cut something out and after that ad another edit poly on top of it and then it ***ks up.

Title: Re: Problem in displacement
Post by: Seabass on 2015-09-21, 10:09:11

Yeah... it's a boolean object.

Title: Re: Problem in displacement
Post by: Nekrobul on 2015-09-21, 10:29:20

Quote from: Seabass on 2015-09-21, 10:09:11

Yeah... it's a boolean object.

Try to remove an edit poly stak from it. Boolean+displacement are friends as long as boolean remain boolean not editable poly\mesh.

Title: Re: Problem in displacement
Post by: hubrobin on 2015-09-21, 15:31:38

Hey,
would it be possible to get a simplified version of the scene where the problem still occurs?

Thanks,
Robin

Title: Re: Problem in displacement
Post by: Seabass on 2015-09-24, 08:36:04

Ok! I will try do it

Title: Re: Problem in displacement
Post by: Seabass on 2015-09-24, 08:48:56

Problem in this scene

Title: Re: Problem in displacement
Post by: maru on 2015-09-24, 11:25:56

That displaced mesh is completely ffffed up. Just go to modify tab > editable poly > retriangulate and put subdivide modifier on top of it. It should work fine. But I wouldn't put displacement on it anyway unless you are able to hide the borders somehow.

Title: Re: Problem in displacement
Post by: Nekrobul on 2015-09-24, 12:30:59

I feel my self obsolite -_- 2016 max can anyone resave it in 2014 i can try to rebuild a proper geometry for example.

Title: Re: Problem in displacement
Post by: Seabass on 2015-09-24, 12:31:57

Ok. Thanks guys!

Title: Re: Problem in displacement
Post by: hubrobin on 2015-10-16, 10:10:51

Hey,

the displacement here really trips up on the bad input geometry. There is not much that can be done to make it right. Did the re-triangulation work for you? Also try to avoid putting really long and thin triangles into the displacement as it may result in undesirable artefacts when you then use micro-detailed displacement texture on such geometry.

Cheers,

Robin