Chaos Corona Forum

Chaos Corona for 3ds Max => [Max] Feature Requests => [Max] Resolved Feature Requests => Topic started by: Polymax on 2013-03-05, 16:13:06

Title: Is it possible to make a caustic from Direct light?
Post by: Polymax on 2013-03-05, 16:13:06

Is it possible to make a caustic from Direct light in the PT+HD mode?
Now the direct light does not pass through the glass material (solid), well, what about the crystal chandeliers, where direct light must pass through the glass elements?
Or caustic should always be considered separately, the photons?

Title: Re: Is it possible to make a caustic from Direct light?
Post by: Ondra on 2013-03-05, 16:41:02

You can increase max sample intensity (or set it to zero to completely disable it), but it will produce fireflies (they would eventually go away, but it might take a LONG time). Other possibility is to try bidir/VCM

Title: Re: Is it possible to make a caustic from Direct light?
Post by: eungen on 2013-03-18, 17:33:56

Hi,
For outdoor scenes I can generate caustics very quickly using photon mapped. But for indoor scenes i can not find a acceptable setting. Can someone help me?

Title: Re: Is it possible to make a caustic from Direct light?
Post by: Ondra on 2013-03-18, 17:50:09

this would path tracing actually handle well.

Try using renderer: VCM/bidir, and set it to BDPT mode in its rollout. Photons are obsolete ;).

Title: Re: Is it possible to make a caustic from Direct light?
Post by: eungen on 2013-03-18, 18:06:22

I dont find VCM/bidir in ALPHA v3 roullots... :-S
LE:  I tray now v.4 and your recommended setting is ok, but the rendering is slow.