A small test with photon map

[GoncaloP]

1 is 1 generic unit since vray works with generic units

Gonçalo

[pengo]

thank u and excuse me for so much questions

thank u and excuse me for so much questions



bye and thanks

soon I'll do an interior for a friend and I'll send u my result

bye and thanks again

great GONCALO

[Brim]

Goncalo - how much system ram do you have? I am rendering the file with your settings and my 1 gig has been eaten up windows is using swap file. Wow. It's doing it now while tracing photons for vraylight02! I need more I think.

[RErender]

I was talking to Gonçalo, well typing to, and he said that search distance should of been at 5 and max density at 1, this will make the memory usage much more managable, I am rendering it that way right now and it is holding at about 350 megs after calcing vraylight02, Also for others trying the file make sure to check new map for the pmap and to change the path for the auto save. after the pmap is calc'd and saved switch to the saved pmap and make sure to change the first bounce to imap and check "single frame" in the advanced settings.

Gonçalo once again shows that he is the King of photons, nice work man!

[GoncaloP]

Sorry for the mystake! and thanks Eric for the support

You should change the max density to 1.0 and search dist to 5.0

Gonçalo

[bakbek]

Goncalo thank you very much for posting the scene...

You mentiond somthing about renedering the photon map only for the walls and then unhiding other stuff that will get illumnation and reflection like they should.

is that after the photon map was made and before we switch to IR for the first diffuse ???

can you please say what is the correct order of calculating all the maps for a camera walk in an architectural model with the sun fixed. i can't seem to get it right ( working with the notion of saving as much time as possible )

hope i'm not asking too much

thank you again
regards,
bakbek.

[pengo]

POOR GONCALO.....

POOR GONCALO.....

now he must help all the users with this kind of explanation!!


Now I understand why someone doesn't reply to some request of explanation

THANKS GONCALO FOR THE SUPPORT

Maybe is better a tutorial then a single help to all (is only a my opinion not a request)

thanks again
:P

[GoncaloP]

Goncalo thank you very much for posting the scene...

You mentiond somthing about renedering the photon map only for the walls and then unhiding other stuff that will get illumnation and reflection like they should.

is that after the photon map was made and before we switch to IR for the first diffuse ???

can you please say what is the correct order of calculating all the maps for a camera walk in an architectural model with the sun fixed. i can't seem to get it right ( working with the notion of saving as much time as possible )

hope i'm not asking too much

thank you again
regards,
bakbek.

Better start with photon map for first and second diffuse bounces:

1-Hide all the small objects in the scene in order to get the best light solution for each light;

2-Make sure you have reflections/refractions off in global switches;

3-Find for each light the amount of subdivisions that are good enough to get a good distribution of the light;

4-With the all lights on, calculate the photon map only with the convert to irradiance map checked;

5- With the saved photon map stored from file, change the first diffuce bounces to irradiance map, unhide all the small object and check reflections/refractions on;

6- Calculate the irradiance map....

Now you can do whatever you want, it works very well and its a good solution since it gives you the capability to work with a very high dinamic range image of your scene, thats why you can get very nice glasses due to the fact that it produces natural caustics.

Gonçalo

[bakbek]

Thank u very much for your time Goncalo... i'll sure implement this steps

Thanks again.
Bakbek.

[pengo]

first of all thank u for the explanation

first of all thank u for the clear explanation

second how many time is the rendering time faster than the irradiance map solution directly?

your room in irradiance map rpocessing how many time request to be calculated respect this new special technique?

bye and thanks again

[GoncaloP]

Just make a test without photon map and look for the results...

Four minuts for the first irradiance map, 30s/frame with incremental add every 10 frames, and finaly with aa tooked 30 seconds each frame...400 frames.

Irradiance map settings -3,1
Hemisphere subdivisions 50
interpolations 20
Clr treshold 0.3
Nrm treshold 0.3
Dist treshold 0.1

QMC sampler

Early termination amount 0.7
noise threshold 0.001

Gonçalo

[Dynedain]

goncalo....i am soooo tempted to just give you my scene to setup for rendering

[RErender]

Yeah, Gonçalo's Photon Service!

[cocolas]

yeah...Goncalo could start making some money setting up lighting/photons for arch viz people..so it would go:

client --> architect --> archviz guy --> goncalo and back through that chain

paul.

[GoncaloP]

LOL