Vray Sun 'n Sky animation using LWF

[DaForce]

Nikki, it really was LC/QMC

Clifton Santiago:
LC/QMC is really quick... but not the greatest quality in the world. But in this scene it seemed to work really well.

I will post my settings shortly. I believe it doesnt work very well on trees tho. I use it mainly for test render purely because of its speed.

[DaForce]

ok settings,

QMC AA 1-100

1ST Bounce: LC
Subdivs 1200
samples size 0.02
scale screen
number of passes 4
store direct light off
show calc phase on
prefilter on @ 10
filter fixed
filter size 0.04

2ND Bounce: QMC
Subdivs 20
Secondary Bounces 20

rQMC sampler
Adaptive amount 0.85
Noise threshold 0.03
Min Samples 8
Global Subdivs Multiplyer 1.0

Rendertime: 2mins per frame @ 640x480

Hope that helps ya.

[Clifton Santiago]

Thanks. I'll give those settings a try. Cheers.

[RErender]

Doesn't the LC just discard the QMC info? Does it look different than LC/None?

[DaForce]

I havnt tried that specifically, but change AA and the QMC subdivs certainly makes a difference

[Clifton Santiago]

LC/QMC and LC/none appear identical. I'll post the results later. So I guess this means there are no secondary bounces with LC/QMC? Why is that?

[DaForce]

hmmm your right they are identical even in my scene. However IR/LC there is a definite difference... although not huge.
The main reason I used LC/QMC (haha now just LC) is the speed 1m57s vs 3m45s
So as it was just a test I went for LC, had it been for production or something similar I would have use QMC/LC.

[sv]

Not too sure why LC/QMC and LC/None would be identical, but this is taken from the help files.....:

There is no difference between light caches computed for primary bounces (direct visualization) and for secondary bounces. You can safely use light caches computed in one of these modes for the other.

[studioDIM]

it might just be that the qmc pass picks out more fine detail redoing bounces 1-3.
but i may be wrong, haven't tested it thoroughly.
I will conduct a few tests limiting the LC heavily, so having it not bounce so much, and see what happens.
EDIT: it seems the LC overrides the secondary choice in terms of contribution to the final image.
A multiplier of 0.01 for the first bounce, and any other method for secondaries seems irrelevanto to the final image.

Lele

[RErender]

[DaForce]

well there you go

[studioDIM]

UNLESS the secondaries are derived off the rpimaries, and the secondaries multiplier is child of the primaries multiplier, in which case kicking the primaries down to 0.01 would kill the secondaries as well, even with a multiplier of 1 (ie. 0.01x1.00. instead of the two being entirely separate.)

Vlado, would you be so kind as to share any hint on the process?

I love it when someone bends tools around. And constantly hope noone does it with my own ones :P

Lele

[biglolly]

Vray Camera? Must be in a new build? I'm on 1.47.03 I believe.

[jacksc02]

yes it is biglolly

[paulison]

DAMN ive been looking through several threads today seing this mystical solution to Lighting called "LWF" and only just found someone expand out what those letters actually stand for....

LINEAR WORK FLOW...good, now I know that its nothing new

I remember seing talk about Linear workflow on this forum ages ago before the term LWF was made up. If people dont come here frequently, all of these abbreviated terms start looking like a foreign language. Bit frustrating :P

I think I used to understand LWF better before but now im wondering why its called Linear workflow. Its basically just a process of rendering using linear colormapping and then correcting the gamma afterwards right?. I guess you could render using any othhr type of colormapping and achieve similar results just by editing the gamma. In the end, its pretty much just gamma correction (This is why im struggling to understand it) Maybe it should be called something a bit more descriptive of whats actually going on if this is the case so that people have a clue what is trying to be communicated. This forum really does have its own language or something!

Plz try keep things simple for idiots like me, thanks