VRay-like interior renders with mental ray???

[dagon1978]

multibounce is not related to quality. and NEVER put more than 2/3 bounces,
it is already wasteful enough. use photon mapping instead. and consider that
if you need so many bounces you have something wrong in your scene… (or
in your head, or maybe in both )

/f

why moultibounce is not related to quality?

i agree for the bounces, i usually use 2 (1-1), 3 (2-1) or max 4 (2-2) diffuse bounces
this is another test with mies scene

p.s.
in this scene i’m using 3 diffuse bounces

[cpan]

yeah, after i tested with 50 i’ve decided to set it to 5-8 in my defaults cuz it provided good quality and also pretty fast rendering times. One thing about photons i don’t like is that they use a LOT of memory and you need about 100.000*k photons to get good results.

[dagon1978]

yeah, after i tested with 50 i’ve decided to set it to 5-8 in my defaults cuz it provided good quality and also pretty fast rendering times. One thing about photons i don’t like is that they use a LOT of memory and you need about 100.000*k photons to get good results.

…and the setup isn’t so quick

[dagon1978]

multibounce is not related to quality. and NEVER put more than 2/3 bounces,
it is already wasteful enough. use photon mapping instead. and consider that
if you need so many bounces you have something wrong in your scene… (or
in your head, or maybe in both )

/f

oh ok, now i understood
the bounce number isn’t related to quality, right?
i agree…

[bgawboy]

That’s an important point. I’d like to repeat it.

FG rays go backward from the eyepoint.
GI/photons go forward from the light sources.
[some folks reverse the terms forward and backward]

There is some overhead to GI and setting up a photon map, but with raytracing, the backwards context will always be in place.

The choices are supplied for optimizing the speed for the look you want.

Anyway, after about 2-3 bounces FG is less effecient than GI, and a combo approach is recommended.

[ajsfuxor]

How do you adjust the amount of diffuse bounces in 6.5?’ I cant find the setting in the render globals?

[leuey]

Geez, Dragon - on behalf of many of us - write some tutorials please. You’ve really got a handle on MR.

Great images.

-Greg

[mathes]

How do you adjust the amount of diffuse bounces in 6.5?’ I cant find the setting in the render globals?

Type miD* in the quick select box and it’ll select the mental ray defaults node.

[ade90054]

Hey all,

I’ve read from this thread roughly what the ‘mib_cie_d node’ does and how to connect it, I’ve just gone to use it and i’m now slightly confused!!

From what I read thought that a value of 1000k would give a warm result and exceeding this number would eventually lead me to a cool colour ( 10,000k ), however the first time i went to use it I inputed a value of 1000k, this gave me a result of almost complete blue??? Any number above this just made things even more blue, to achieve a warm colour I had to input a value of 1 ! Is this right?? It’s although my units are all screwed up, surely it would make more sense to have the value you need to input tie in with the temperature chart someone posted earlier??

Has anybody else have this problem???

Any help would be wicked, thanks.

Jimmer.

[floze]

Has anybody else have this problem???

If you did a little search about the mib_cie_d (and I assume you did and just overlooked the solution) you’d have noticed that the ‘Temperature’ ranges between exactly 4000 and 25000. Anything below or above this values will probably result in invalid output.

…they should have built in a softmin/softmax for this shader. :hmm:

…

[Pixero]

You can easily try to see if it works with softmin and softmax by just editing the mi file.

Example:

scalar “temperature”, #: default 5000.0 softmin 4000.0 softmax 25000.0

Edit: ALWAYS make a backup copy before editing!

[ade90054]

Cool, thanks for that, my speed reading isn’t what it used to be, lol

[floze]

You can easily try to see if it works with softmin and softmax by just editing the mi file.

Example:

scalar “temperature”, #: default 5000.0 softmin 4000.0 softmax 25000.0

Edit: ALWAYS make a backup copy before editing!

Yeah sure, but most people dont know this a priori so mental images really should make this by default (instead of documenting it like a little unimportant side note).
No heavy crit, but a sincere suggestion.

[avisgrafik]

wowwwwwwwwwwwwww extreme sampless

pls more final gather and mental ray samples:):applause:

[Synthesizer]

Wow! I just tried out Maya 6.5 and the diffuse bounces. It was so fast and with almost no artifacts on extremely low settings! And it was really easy to set up too. Perhaps Vray has found its match?

[bloop]

I have learned a lot from this tread…thats an interior in progress (actually exterior lightning)
MentalRay3.4 Maya6.5… increadibly fast…FG(ibl)+m_bounces.

[dagon1978]

as I promised, this is my first tutorial (in italian language sorry )

GI+FG
http://www.treddi.com/forum/index.php?showtopic=4858

I hope that it can be helpfully

ciau

mat

[Splin]

Hey dagon, thx alot!

I guess pictures say thousand words truly, definitive bookmark!

[ronaldomiranda]

Thanx a lot Dagon, MY IDOL!!! lol

[popol]

Thanks dagon!

and a mib_cie_D tutorials (in spanish)

http://www.deathfall.com/modules.php?op=modload&name=XForum&file=viewthread&tid=2287