<div dir="ltr">yes, but filter glossy does a little more (that can't be done by the nodes)., but it is the same logic.</div><div class="gmail_extra"><br><div class="gmail_quote">On Thu, Aug 25, 2016 at 12:07 PM, lsscpp <span dir="ltr"><<a href="mailto:lsscpp@gmail.com" target="_blank">lsscpp@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div><div class="gmail_default" style="font-family:arial narrow,sans-serif">Isn't this already in being it the filter glossy feature?</div><br> </div><blockquote style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex" class="gmail_quote"><div class="gmail_default" style="font-family:arial narrow,sans-serif"><pre>I know what do you mean, you want a sampling for caustics only, let's see
how caustics are created:
ray emit from the camera, hit a diffuse surface, bounce to a
glossy/refraction surface (with low roughness), hit the light.
so to get a better caustics you will need to increase diffuse samples.
but on the material side, you can catch indirect caustics, but using is
singular ray and is glossy/refraction rays for low roughness shaders.
to catch direct caustics, you will need first bounce to be "is diffuse
ray?" when your actual shader is a glossy/refraction material.
to reduce caustic noise you will need to increase roughness of your
glossy/refraction shader after the diffuse ray. (this will allow to catch
more light paths).
hope I didn't mess anything, if I mentioned anything wrong others may
correct, thanks.
On Tue, Aug 23, 2016 at 6:20 PM, Zauber Paracelsus <<a href="https://lists.blender.org/mailman/listinfo/bf-cycles" target="_blank">zauber at gridmail.org</a>>
wrote:
><i> Could you clarify your meaning?
</i>><i>
</i>><i> On 08/23/2016 12:09 PM, Mohamed Sakr wrote:
</i>><i> > I guess you can catch caustic samples using is singular ray?
</i>><i>
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