Caustics and memory issues

[Morbid Angel]

further testing, here is brazil closeup and console info:

PHT: generating caustic photon map
PHT: emitting 10000000 total photons from 1 light
PHT: 668 Mb allocated for photon map
PHT: creating 2 threads
LIT: Brazil Light01 Emitting 10000000 photons...
PHT: terminating threads
PHT: main pass stored 24509902 photons
PHT: 24509902 photons stored



Here is vray closeup and console info:

Building caustic photon map.
[2005/Sep/1|11:41:24] Setting up 2 thread(s)
[2005/Sep/1|11:53:20] Threads completed
[2005/Sep/1|11:53:50] Number of caustic photons stored: 6449872
[2005/Sep/1|11:53:50] Caustic photon map takes 646012920 bytes (616.1 MBytes)
[2005/Sep/1|11:53:50] Photon size is 56 bytes.



At this point, I have used max density at 0.1, search radius at 0.28, maximum photons 160 and caustic subdivisions at 4000. Now the memory is around 1 gb but as you can see brazil is casting 12 million photons and vray almost 6 million (all tho it should cat 12, but max density cuts it by half) and the presicion differences of caustics now is greatly noticeble. The render time is close, vray 13 min brazil 15 min.

[vlado]

The Brazil console says it's casting 10 million photons, not 12; also 4000 subdivs in V-Ray mean that it is casting 16 million photons, not 6. Also, it seems that the Brazil material is casting transparent shadows - you should disable that, since the caustics already account for the light passing through the objects...

Best regards,
Vlado

[DaForce]

If im understanding it corrently brazil stored 24.5million photons whereas vray only stored 6.4million

[Morbid Angel]

sorry i redid last post from an older version and messed up the numbers. Yes brazil light is castin 10mil photons but stored is 24 which is way way more then vra as it says 6 million 449,872. Thats how Im seeing it. Anyway, its an iteresting test imo.
I also tried it in mental ray, whats funny that it uses same principal exept 1 thing. It casts a certain amount of photons in render globals called avarage photons per light. Then it breaks it up between objects that cast caustics. So if you have 2 objects with cau and 50000 photons that would be 25000 per object. Weird.