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Render Time
show user profile  Justin101
Hi all,

Im working in 3ds Max 2011 with Vray and need to cut down render time.
I'm doing a house night shot with proxy plants and many light sources so it's
really chugging when it comes to render time.

My render settings are as follows.
Image sampler - Adaptive DMC
Indirect Illumination Primary Bounces - Irradiance Map - Multiplier 1.0
Indirect Illumination Secondary Bounces - Brute Force - Multiplier 1.0
Irradiance Map - Medium (Im now trying to render the scene on LOW)
Brute Force Subdivs - 50, Secondary Bounces 1

Sometimes when I do a test render, the main porch spot light just does not
turn on which is very strange. I think the higher the Irradiance Map (Mudium)
the more likely the spotlight will work.

Also I have quite high Subdivisions on all materials that have reflections added, to
help prevend those silly white bright dots from appearing.

Can anyone help suggest something?
Thanks




read 477 times
2/11/2015 9:45:16 AM (last edit: 2/11/2015 9:45:16 AM)
show user profile  herfst1
It's a huge can of worms.

Two things that I know slow down render times: a lot of anti-aliasing, a lot of lights.

Anti-Aliasing
If you select samplerate as a render element and do a test render you'll know your settings are all good if the samplerate render is mostly deep blue. If it's red then you are making the anti-aliasing work too hard.

DMC
You can set the noise threshold for the dmc higher (e.g. from 0.001 to 0.01) and the max number to around 3 or 4. That should reduce the amount the anti-aliasing does.

SHADOWS, REFLECTIONS, REFRACTIONS etc.
You'll want to add a raw shadow, light, reflection etc as render elements and check how noisy they are. If there's noise you'll want to up the subdivisions for each. E.g. Shadow noisy --> up shadow subdivs for lights.

read 474 times
2/11/2015 10:14:21 AM (last edit: 2/11/2015 10:16:43 AM)
show user profile  donvella
someone posted this awhile ago, if you follow the directions at the bottom you will save yourself alot of time and your renders will look far better

http://www.cggallery.com/tutorials/vray_optimization/




read 426 times
2/11/2015 11:57:15 PM (last edit: 2/11/2015 11:57:24 PM)
show user profile  luxxeon
If you use Vray, invest in Solid Rocks. Guaranteed to speed up your render time in Vray, no matter how good you think you have your settings.

http://solidrocks.subburb.com/index.php


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My Youtube Video Tutorials:
https://www.youtube.com/user/luxxeon3d
read 417 times
2/12/2015 2:57:04 AM (last edit: 2/12/2015 2:57:41 AM)
show user profile  donvella
I used to use solidrocks... understanding how vray works though is a whole different ball game





read 403 times
2/12/2015 6:50:42 AM (last edit: 2/12/2015 6:50:42 AM)
show user profile  herfst1
@ Don, agree with you 100%, don't use Solid Rocks if you want to get better (as in, improve AND get better renders). And that link you posted (along with Grant Warwick's Mastering Vray) is what helped me understand it for the first time.
read 395 times
2/12/2015 7:45:58 AM (last edit: 2/12/2015 7:46:44 AM)
show user profile  FX
Use both methods, SolidRocks is great for quickly setting up scenes and more configurable than the current Vray3.0 presets.

You can easily Init/Save all the SR settings into your scene and tweak till your happy.

You can still *understand* how Vray works whilst using SR, but SR saves you bouncing round the UI.

Even Chaosgroup realize how over-convoluted the UI is, ergo presets and levels settings, although hiding features in anything other than *advanced* seems silly.

I am a lazy ass btw :)



read 388 times
2/12/2015 8:15:44 AM (last edit: 2/12/2015 8:15:44 AM)
show user profile  Justin101
Thanks for all your comments people.
Much appreciated.
read 382 times
2/12/2015 10:24:21 AM (last edit: 2/12/2015 10:24:21 AM)
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