Advanced Settings Epsilon Value

Use this forum for general user support and related questions.
Forum rules
Please upload a testscene that allows developers to reproduce the problem, and attach some images.
Post Reply
Racleborg
Posts: 621
Joined: Sat Apr 07, 2018 10:31 am
Location: UK

Advanced Settings Epsilon Value

Post by Racleborg »

Hi

I understand that reducing the Advanced Settings Epsilon value to .0001, from .00001, can help reduce artifacts when previewing.

Does it also effect things such as the Clamp Values and the main render?

Thanks
User avatar
B.Y.O.B.
Developer
Developer
Posts: 4146
Joined: Mon Dec 04, 2017 10:08 pm
Location: Germany
Contact:

Re: Advanced Settings Epsilon Value

Post by B.Y.O.B. »

I think you mean "increasing".
Racleborg wrote: Sun Dec 02, 2018 1:56 pmDoes it also effect things such as the Clamp Values
No. The epsilon is mostly used in ray-triangle intersection tests.
Racleborg wrote: Sun Dec 02, 2018 1:56 pm and the main render?
Yes.
Racleborg
Posts: 621
Joined: Sat Apr 07, 2018 10:31 am
Location: UK

Re: Advanced Settings Epsilon Value

Post by Racleborg »

Increasing-yes :oops:

If it effects the main render, then I'll play safe and leave it at default. (It does say 'Advanced' settings and I'm definitely not an advanced user! :) )
User avatar
B.Y.O.B.
Developer
Developer
Posts: 4146
Joined: Mon Dec 04, 2017 10:08 pm
Location: Germany
Contact:

Re: Advanced Settings Epsilon Value

Post by B.Y.O.B. »

If you only need to change it because of the ortho viewport render, I would indeed leave it at the default.
But if you notice self-intersection artifacts in perspective mode, you should change it.

This setting can get you in unexpected ways, for example it can make SSS look completely wrong when min. epsilon is set too high.
Racleborg
Posts: 621
Joined: Sat Apr 07, 2018 10:31 am
Location: UK

Re: Advanced Settings Epsilon Value

Post by Racleborg »

Thank you.
Post Reply