pool water caustics- daforce method

[DaForce]

Yeah try 3000-4000 see how that looks and lower your saerch distance to say 5cm or even lower.. but you may neeb more suddivs.

[visumporec]

Notice that caustics are less visible in HSV color mode.
http://www.chaosgroup.com/forum/phpB...t=hsv+caustics
I used only vraysun for the caustics in the scene (no extra light source for the caustics) with reinhard color mapping.
Also it depend of water surface too...

[giraffe]

when lower search distance, it gets very dark inside pool

my color mapping is linear.

I just wanted to learn something.
u have one sun illuminatig all scene and generating caustics too but your photon emit radius must be covering only pool.
does this fast up things too?
I mean I can understand that it focuses photos in that area and it also saves time I think - not calculating caustics in areas we are not bothered.
OR do you think we must define photon radius as the all of scene?

PS: soon will sending the render with more subdivisions.
I think this was the point

[visumporec]

u have one sun illuminatig all scene and generating caustics too but your photon emit radius must be covering only pool.
does this fast up things too?

Yes only cover the pool!
One of the reason was to preserve caustics bouncing from windows glases, metal, etc...
Probably this make faster caustics calculation

[giraffe]

here is render with 4500 subdivisions

[giraffe]

Yes only cover the pool!
One of the reason was to preserve caustics bouncing from windows glases, metal, etc...
Probably this make faster caustics calculation

yes I think one reason is that. to make faster.
and 2nd reason is to make the photon map more focused on one area I think.

[visumporec]

Woau, much better!

[DaForce]

yep exactly stops wasting subdivs.

You have learnt well obiwan

I might make up a little caustics tut in its own thread for all the non-caustics users. I think people might find it usefull.
Saves people like giraffe and a few others searching around the forums for broken pieces of info.

The update looks good giraffe!! Can I see a render from a high camera angle to see the caustics more clearly?

[Da_elf]

http://www.elfpro3d.com/Tutorials/Sw.../swimming.html

well thats the contribution i did a while back. basically this is what the result looks like which i use alot

[alexthg]

@Giraffe & Visumporec:
How big is your caustic files? I often get HUGE caustic file (100mb-700mb) at default settings & 1500 subdiv, and that's for a small pool, with size like visumporec's. Anyway to lower this number? I already focus the photon radius just to cover the pool.

Also sometimes I got caustic not showing while stripe-rendering via backburner (caustic + Irrmap + LC are precalc). Can't remember the details... I'll look into it later, could be my own stupidity.

[DaForce]

You can use max photons to lessen the file and memory size. However you may loose some details.. I think thats how it works.

But honestly does the large file make all that much difference?

[visumporec]

@Giraffe & Visumporec:
How big is your caustic files? I often get HUGE caustic file (100mb-700mb) at default settings & 1500 subdiv, and that's for a small pool, with size like visumporec's. Anyway to lower this number? I already focus the photon radius just to cover the pool.

Honestly, I dont care about this...

[giraffe]

obiwan hehehehe this is so funny.

your tutorial will be so helpful to everyone!
actually maybe only gathering the info under one thread is enough. because I think there is enough info.

I didnot care about photon size too.
now looking at it and it is 702.8MB
but now I have one question: is this how much space it takes on RAM? or is this written on somewhere on hard-disk temporary?

daforce I am sending the higher camera view

[DaForce]

hehe

No it doesnt take up that much space in memory.. well.. as far as I know anyway, but I dont know for sure.

[ene.xis]

that last image is gr8!
this thread has been very usefull for me!
thanks guys and gals