[Bf-cycles] Clamping just secondary rays

[Matthew Heimlich]

The newest version of vray has indirect clamping. It's a huge help and
almost completely gets rid of the issues with fireflies. Would be great to
have in cycles.
On Feb 9, 2014 12:07 PM, "Marco G" <digitalbath86 at hotmail.com> wrote:

> That could be even better and more flexible. IMHO this could also help
> hair rendering with Hair BSDF potentially,
> since it involves reflections, it gives fireflies quite easily, thus
> having this indirect clamping could preserve
> hairs direct highlights and get rid of bright pixels from indirect.
>
> One of the most fireflies-prone setup is tiny radius spot-point lights
> lighting sharp glossy.
> I've made a super simple scene (in the link) showing this, using MIS
> and/or filter glossy doesn't help,
> the only thing helping is clamp but then we loose the whole tone range.
>
> Link to the scene - http://www.pasteall.org/blend/26752
>
> Thanks. MG
>
> > From: brechtvanlommel at pandora.be
> > Date: Wed, 5 Feb 2014 17:03:46 +0100
> > To: bf-cycles at blender.org
> > Subject: Re: [Bf-cycles] Clamping just secondary rays
> >
> > Yes, I can see that would be useful. We could split up the clamp
> > option in direct and indirect parts so you can still clamp direct as
> > well but less.
> >
> > Brecht.
> >
> > On Wed, Feb 5, 2014 at 12:05 PM, Marco G <digitalbath86 at hotmail.com>
> wrote:
> > > Hi all,
> > > i was wondering if current clamp option is affecting every ray (also
> direct
> > > ones), and maybe it could be made to affect just secondary rays to
> clamp
> > > fireflies from glossy bounces etc, while preserving direct
> > > highlights/reflections on shiny objects. Makes sense?
> > >
> > > Regards, MG
> > >
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