Request- Film Response Curves (Comparing Octane to V-Ray)

[^Lele^]

Can you save out as max 2014 and I'll take a look?

yep, absolutely.

here it is

Octane_IS_Issue_2014.zip

[grantwarwick]

Can you post your vrimg and the .cube file please?
I'll see if I can get it working in AFX

Sure! Just need to re-render it.
IN AFX I used the linear to log utility then then LUT utility but it wasn't matching. Never really used AFX that much though for color correction.

[3LP]

yep, absolutely.

here it is

[ATTACH]25494[/ATTACH]

I though it was funny the name you gave it, but you could be more blunt and call is "Octane is THE issue.zip"

Stan

[^Lele^]

Well, have that cast a sharp shadow on something when at gamma of 1.0 and a power of 0.1.
Then i'd like the file as well, LOL.

[^Lele^]

I though it was funny the name you gave it, but you could be more blunt and call is "Octane is THE issue.zip"

Stan

LOOOL!
This is what you get being scarce with punctuation, Lele!

[grantwarwick]

Sure! Just need to re-render it.
IN AFX I used the linear to log utility then then LUT utility but it wasn't matching. Never really used AFX that much though for color correction.

Here you go man
http://www.megafileupload.com/997q/I...est_GW_001.zip

[jenya.andersson]

hey just wondering has ACES workflow been implemented into vray?
Also this looks interesting ACEScg:

http://www.fxguide.com/featured/sigg...1-and-digipro/

[grantwarwick]

LOOOL!
This is what you get being scarce with punctuation, Lele!

Can you show me your result/ comparison, Octane is blue as all shit

[grantwarwick]

hahaha wtf is going on, I'm losing my mind!

[^Lele^]

That's precisely what i got, and what one would get with poor/no importance sampling.
The little, but very bright, orange sun disk is drowned out by the amounts of blue.
Some ray will still hit it and trace properly, but most will end up in the blue sky.
The HDRI was built PRECISELY to benchmark Importance Sampling in the various engines.
Corona (shown above by someone else. I haven't bugged Adam for the NFR license yet, must remember to.), iRay, rMan, Arnold and RedShift all produced (much, if not exactly) the same results.
This is a fail unless the oranges creep back in.
I haven't managed on my side either, but then i can't render it big enough (demo is resolution limited.).

I have a sneaky feeling things MAY get better if you rendered much bigger, say at 4k.
Give it a try, will ya?

[grantwarwick]

That's precisely what i got, and what one would get with poor/no importance sampling.
The little, but very bright, orange sun disk is drowned out by the amounts of blue.
Some ray will still hit it and trace properly, but most will end up in the blue sky.
The HDRI was built PRECISELY to benchmark Importance Sampling in the various engines.
Corona (shown above by someone else. I haven't bugged Adam for the NFR license yet, must remember to.), iRay, rMan, Arnold and RedShift all produced (much, if not exactly) the same results.
This is a fail unless the oranges creep back in.


I haven't managed on my side either, but then i can't render it big enough (demo is resolution limited.).

I have a sneaky feeling things MAY get better if you rendered much bigger, say at 4k.
Give it a try, will ya?

So Octane is dogshit and I've manipulated what it can do into faking better results. I'm not sure whether to be disappointed in the engine or impressed with myself ???

[^Lele^]

hey just wondering has ACES workflow been implemented into vray?
Also this looks interesting ACEScg:

http://www.fxguide.com/featured/sigg...1-and-digipro/

http://www.fxguide.com/wp-content/up...1/08/Aces2.jpg

Look at the image linked: CG goes INTO ACES, AFTER the rendering is done.
Case closed, hopefully.

[^Lele^]

So Octane is dogshit and I've manipulated what it can do into faking better results. I'm not sure whether to be disappointed in the engine or impressed with myself ???

I am both.
The IronMan match was uncanny, given the tools at hand.
And while i may sound an utter fanboy (all the more so i have an official role of sorts), i REALLY try hard to be as impartial as i can be.
Nothing would damage Chaos more than a biased, or wrong, comparison with a competitor, in my current line of work.
If someone's being better at something, well, hat tip and let's find out ways to improve ourselves, this is the spirit.
Octane's unfortunately been showing sings of age for a while, now, and my guess is that OTOY's fully concentrated on their next product.
This said, it may just be we're doing something wrong, or missing the (non) obvious, and then the issue would be back to a simple UI/user one, rather than conceptual (something i am all too aware of. it of course keeps happening while i am getting comfortable with a new software, before i am confident enough to start benchmarking.).
I won't be spending much more time on this, though, i have other stuff queued, and Octane wasn't on the radar beforeI stumbled in this thread...
I'd be glad to see a solution to this, though, so i could actually benchmark the scene properly.

[peteristrate]

Is there any indication when V-Ray RT GPU will support bercon maps? Apart from that I've come to the sad realization that I am completely retarded for not testing it in over a year...It's unbelievable

We're using RT for more than a year and a half.
In fact, I've founded the whole company betting on the RT technology, so we invested purely in videocards. And it's been a lucky bet We've been experiencing with a few other RT rendering engines, but we considered Vray as the most reliable based on ROI(return of investment), even if at that time it was quite/really buggy.
We don't even consider using Vray Advanced. Actually, we never used it in 1 and a half years(when the company was founded), except doing some masks for a few scenes. Basically, our computers never seen Vray Advanced
RT is the future(even if it needs some further developing, but i hope things will be fixed progressively and soon) so i don't even think going or looking back to CPU rendering.

[^Lele^]

Oh, by the way, i endeavoured to convert some of the curves in OpenOffice (X goes from 0 to 1000, Y represents the corrected value) and i noticed i was quite wrong in supposing the curves were all 1D.
In fact the camera curves ARE RGB, it's the Gamma and Linear and a few minor others which are just brightness.
This said, they clip to 1.0, and no, given they are not principled curves (with the exclusion of linear modes and derivatives), but empirically measured ones, it's impossible to know what the value will be at 1.001 float, and much less so extend the range towards the values we'd need with a sun and sky setup, for instance, or a bright enough light.
The only possible way to apply those curves is to reduce the image range to the covered one (0-1), clamping/clipping it as a consequence (to be fair, SOME are in Log so clipping would occur higher up @ 13 float, still clipping nigh any visible lightsource.).
Alternatively, one could apply the curves only to the 0-1 tonal range, and let the higher values behave normally.
But with some of those curves, and this approach, a white light would end up lighting green, a red one yellow, a blue one green, for some seriously whacky-looking imagery...