Author Topic: Water caustics - fireflies  (Read 12521 times)

2018-06-29, 11:06:37
Reply #30

Air Dnipro

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Caustics require a big enough light to be correctly sampled. The HDRI or the Sun/Sky Object won't help much. Also, the PPM engine will fuck many of your other materials. Try using a huge circular Area light directed at the pool with directionality ~60.
It's best to only have the top part of the mesh be displaced and not ripped off from the rest of the box. Also, a portal might help.
This engine metod good only gor caustic effect? maybe I can merge my pool with other scene? As I know Corona have no caustic mask in multipass (   Thanks for advise, its very helpfull

2018-06-29, 12:44:59
Reply #31

Eddoron

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or just fake the caustics. nobody will ever try to recalculate the rays back to their origin. maybe a savant, but those are rare.

2018-06-29, 12:50:36
Reply #32

Air Dnipro

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as I can see caustic effect need much light, how to increase caustic that on wall (near pool) I see caustic too?

2018-06-29, 13:36:36
Reply #33

beanzvision

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as I can see caustic effect need much light, how to increase caustic that on wall (near pool) I see caustic too?
Try using a c4d light and project a caustics map on the wall.

2018-06-29, 14:20:19
Reply #34

Air Dnipro

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You mean using c4d-light in corona-scene? I dont know how to separate caustic by multipass )

2018-06-29, 15:40:23
Reply #35

beanzvision

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Fake it til you make it.

2018-06-29, 15:47:10
Reply #36

Air Dnipro

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its so realistic caustic! looks very realistic and cool! caustic on the wall made by corona?

2018-06-29, 15:52:15
Reply #37

beanzvision

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The wall caustics was generated by a c4d spotlight with just a c4d alpha mat applied to the light and projected in flat mapping. For a 2 minute setup, i wouldn't call it realistic but if one spends more time on something it could be better. ;)

2018-06-29, 20:00:18
Reply #38

Air Dnipro

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hmm, how do made alpha-channel in standart renderer of Cinema 4D? ) I try to use standart c4d-light in corona (PPM render engine) and render was worse )

2018-06-29, 20:13:31
Reply #39

Eddoron

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You have to align the texture to the (spot)light first.
And get away from the PPM engine. It won't help you a bit when you're faking it anyway and the rest looks often worse.
You could also use a noise in the illumination /opacity channel, stacked onto the material that you want to have the caustics. One or two animated noises and maybe a distorter should be enough.

2018-06-30, 00:37:37
Reply #40

Air Dnipro

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Thanks to you, amigo!

2018-06-30, 11:44:01
Reply #41

Air Dnipro

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I find interesting c4d-file with caustics, maybe it help someone ;)

2018-06-30, 23:58:37
Reply #42

Eddoron

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I added a spotlight with a distorted noise, so you can have animated caustics and control where they appear.

2018-07-01, 13:59:37
Reply #43

Air Dnipro

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I create real caustic in cinema 4d, but look like a fake... And I have a some artifacts in shadow

2018-07-01, 19:41:25
Reply #44

Marvey

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Fake it til you make it.



can you share the scene? thanks