Caustics

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1

Here is an interesting image that is rendered only with photon mapping as both primary and secondary GI engine:

It’ s kind of interesting since the room is lit entirely by caustics.

Best regards,
Vlado

2

hmmm, is the photon engine evolving or has this always been possible? I have not touched them for a loooong time.

3

It has always been possible, although typically you’d get dark corners where the walls meet - which has been corrected to a great extent now.

Best regards,
Vlado

4

nice one Vlado…just as I’m getting to grips with LC I have to re-learn photons…wheeee

5

Hehe, it’s very slow to get this kind of images smooth enough, and the method I used is not very practical :slight_smile: The light cache is still a lot faster, if you don’t need caustics.

Best regards,
Vlado

6

OOOhhh !
Very interesting phisical shapes of the light.
Impressive!
Gaël

7

That’s quite an interesting image Vlado. Could you tell me why this is a photon mapping specific feature? Isn’t this possible using other GI methods, such as IM and/or LC?

I know that you can assign a number of photons to lights to create caustics, but can’t you use IM and other GI methods and turn on caustics to get the same effect?

Cheers,

Metin

8

Well, you can get this effect with backward GI too, but it’s going to take a lot more time. This is because the light is very small, and the probability that a GI ray will hit it is also very small.

Best regards,
Vlado

9

Hmm,

looks nice so far. I think the caustix could be getting faster in Vray. in my opinion , caustix, are one of the (few ) weak points in vray. complicated to set up and not as superfast as the rest of vray.

but at last i dont use them often enough to realy be abel to judge them .

Tom