www.kraytracing.com

Hi,

I am rendering at 3508x2480. The first pass was fast ( 3 hours) but
when Kray is resampling the edge, the rendeing is very, very slow ... ( 6 hours for 15% .. ) now I am thinking to stop the rendering ( too slow I won't be rendered in time).

Do you have any adivice to speed up this process ? Or to bypass it ?

Thanks you
It's very urgent my deadline is in 2 days ( I have 4 pics to render).

what are your AA settings?

I use the "High defaut setup" in sampling menu
octatree at 60 .

note: when I render at 800 x 600 , it's fast. no problem with resampling.

---- edit

I found a desesperate solution:
Octatree at 30
Low antialisasing
And I split the scene in 3 pieces with limitedregion 2.
(composite in photoshop)

I have to find out how to render multiplescene with the last BNR update (It says Kray support)

If have any advice to have a better antialiasing. Only on the "sharp edge". please share

I noticed that there is small difference (exposure) when I render with limitedregion. To blend correctly the 3 parts I must render more pixel on the border to stich the 3 pics. I use a small gradient(mask) in photoshop to not see the different exposure. Do you have this problem? Maybe I have to buy virtualrender

The High AA settings are overkill for such a high res, you probably don't need FSAA for that. About the exposure thing, it could be a bug related to AA, I noticed something similar with some pixel filters when FSAA is used.

I suggest you use Grid 2, with 0,1 on all detection settings, no FSAA, thickness 1 or 2 and a somewhat blurry pixel filter (try mitchell)

I used virtualrender on a HUGE poster/facade print which was like 120.000 x 20.000 pixels across.

it DOES work like a charm, I recommend it for extreme print work

Matt -

Octree 60 is really overkill for everything i can think of so 30 will be more than sufficient in almost any situation.
If you set Octree to 60 you will use up a lot of your memory that could be used for better purpose like holding the frame itself in memory.

So, in the new Kray we have Low, very low, normal and High octree settings.

Would HIGH be the new "60" or "overkill" for scenes? should we use Med instead?

Thanks -

Another thing.

I am rendering an animation, I computer the GI file with the octree value in the HIGH setting, now I am loading the GI and rendering the frames with it in the NORMAL setting, but the RAM DISK cache is still rocketing to the roof, (28GB now)

is this normal?

Thanks -

Matt -

_mats_ wrote:Another thing.

I am rendering an animation, I computer the GI file with the octree value in the HIGH setting, now I am loading the GI and rendering the frames with it in the NORMAL setting, but the RAM DISK cache is still rocketing to the roof, (28GB now)

is this normal?

Thanks -

Matt -

Hey maybe Your scene is big and maybe You need LOW or VERY LOW octree.
Ofcoarse You can use NORMAL or higher but You swap memmory will be bigger.
LOW Octree is very good for all scenes.

The only reason to ever fiddle with the octree settings is if Kray literally stops rendering.
This could manifest before, (Octree calculations is much more optimized now) such as when you had for example a building and within that building you added a quite complex object with high polygon count, the room itself renders fast but every time kray should render some part or pixels of that detailed object it takes forever,almost stops.

THATS when you need to raise the octree.

An octree of 25-30 is rather high. The presets are now as this: Very low=25,Low=30,normal=35 and High settings=40.
Raising the octree manually to something above 40 would be astronomical and is not recommended for any project.
If anyone have a scene that seems to behave strange, eats up lot's of memory or still renders dog slow please send it to us so we can investigate it.

Excellent advice, thanks guys !, much appreciated

So much to learn, im still playing it by ear, need to learn how to really optimize settings

Matt -

Mk, have you maneged to render with Kray and BNR without virtual render?
I'b be suuuper interested if you could explain, thank you by advance!

khan973 wrote:Mk, have you maneged to render with Kray and BNR without virtual render?
I'b be suuuper interested if you could explain, thank you by advance!

hi, as a tester of BNR, Virtualrender and kray I can tell you more, but at this moment not in public. If you ask me on Newtek Open Beta forum, I can tell exactly how and what.