Caustics

motorsep · Post by **motorsep** » Sun May 20, 2007 2:43 pm

Does Indigo do caustics? Something like that:

Post by **OnoSendai** » Sun May 20, 2007 3:04 pm

daniel_nieto · Post by **daniel_nieto** » Sun May 20, 2007 6:19 pm

hehe, ono that's it. Extending a little more his answer, i'll say that indigo does everything what other unbiased renderers do.

CTZn · Post by **CTZn** » Sun May 20, 2007 6:27 pm

"Caustics"

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joegiampaoli · Post by **joegiampaoli** » Sun May 20, 2007 9:13 pm

Oh wow! Caustics.......

Kram1032 · Post by **Kram1032** » Sun May 20, 2007 10:25 pm

actually, it does caustics better, than in that pic

you also can add cbc (which is slow, but looks great)

That pic looks strrange:
as if this just was a plane with ripples on it.
no thickness -> beyond water, the cubes don't look different from above...

Indigo transparent stuff HAS to have thickness

manitwo · Post by **manitwo** » Sun May 20, 2007 10:47 pm

Kram1032 wrote:Indigo transparent stuff HAS to have thickness

for this i used a single plane with NO thickness

Kram1032 · Post by **Kram1032** » Sun May 20, 2007 10:53 pm

how?
I mean: IoR 1 wont give caustics, as far as I know and IoR >1 will give black plane... how did you do it?

suvakas · Post by **suvakas** » Sun May 20, 2007 11:00 pm

In my tests the caustics are way better if the plane has no thickness. I don't know why.

manitwo · Post by **manitwo** » Sun May 20, 2007 11:53 pm

Kram1032 wrote:as far as I know and IoR >1 will give black plane...

nope. used 1.33

Kram1032 · Post by **Kram1032** » Sun May 20, 2007 11:56 pm

since when does that work????
nomally, those things turn black!!!

manitwo · Post by **manitwo** » Mon May 21, 2007 12:21 am

since a long time i think

Kram1032 · Post by **Kram1032** » Mon May 21, 2007 12:32 am

yes, that scene was some time back, right?
but after that, thee where many problems...
why the hell doesn't work thin glass, then, for example???

motorsep · Post by **motorsep** » Mon May 21, 2007 2:39 am

manitwo,

While your image is cool looking, it doesn't look like sphere and cube are underwater. Caustics are cool, but less light suppose to go through the "water" surface and therefore objects that are below "water" line (including walls and floor) should darker (since they should get less light) than objects above "water" line.

manitwo · Post by **manitwo** » Mon May 21, 2007 4:00 am

Kram1032 wrote:yes, that scene was some time back, right?
but after that, thee where many problems...
why the hell doesn't work thin glass, then, for example???

cause thin glass has to have an entry and an exit point to look right.
in my scene a entry point alone is enough.

motorsep wrote:manitwo,

While your image is cool looking, it doesn't look like sphere and cube are underwater. Caustics are cool, but less light suppose to go through the "water" surface and therefore objects that are below "water" line (including walls and floor) should darker (since they should get less light) than objects above "water" line.

no. i dont think it should be darker underwater - atleast for clearwater. if you want to make the water a little bit more realistic you could use a bit absorption or sss ... or both

Caustics

Caustics

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