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[Blender] Speeding up Cycles Renders
show user profile  Nik Clark
I've had some free time this evening, so I thought I'd spend some time trying to figure out how to get faster renders out of Cycles, the render engine inside Blender. I've done many, many renders with different settings to come to these conclusions.

My scene uses one sun light and an HDR image for IBL.

I managed to shave a lot of time off the render. The following picture sums up my findings:

To sum it up, for GPU rendering:

Set the bucket size to 256x256. For some mathematical reason, this is the best bucket size for the GPU.

Turn down the bounces until they are low enough to produce the result you want. There was no difference between 12 and 128 bounces in this scene.

When using an HDR image for IBL, turning on Multiple Importance sampling made a huge reduction in image noise, with no render time penalty.

I think there I could trim a few seconds off the render with more tinkering, as there are a lot of settings to adjust, but I am pleased that I have managed to cut as much time off the render as I have. I think I've learned a lot this evening.

Also, this shows how much faster the GPU rendering is with Cycles. Doing some tests this afternoon, I found that an ageing Nvidia 560ti renders about the same speed as a new i7 machine. I am impressed with the work the Blender foundation have done with Cycles.

This isn't a conclusive test, but I'm starting to get the hang of Cycles, and I love it.

read 1537 times
5/6/2015 12:48:25 AM (last edit: 5/6/2015 1:30:24 AM)
show user profile  Sangre
I'm guessing that Cycles is using the built in graphics core when using CPU. The newest intel HD graphics core is still not nearly good enough to compete even with older graphics cards.
read 1488 times
5/6/2015 9:15:33 AM (last edit: 5/6/2015 9:15:33 AM)
show user profile  Nanne
Pretty cool Nik! Impressive time reduction and the image on the right even seems to have less noise.

I'm looking forward to your "The Ultimate Guide to Blender for 3ds Max Artist" video tutorial series you are about to create; hint, hint ;)

Kristoffer Helander
  :: Works ::   |  :: Resumé ::   |  :: Contact ::   |  :: CG Blog ::   |  :: Links ::     
read 1484 times
5/6/2015 9:29:35 AM (last edit: 5/6/2015 9:29:35 AM)
show user profile  Sangre
^^^^ there's no need for that. These are the two different types of software that basically do the same. It would only take a few days for a max user to get over a dodgy Blender UI and learn the shortcuts for blender tools that do similar stuff to max tools you're using.
read 1481 times
5/6/2015 9:38:16 AM (last edit: 5/6/2015 9:38:16 AM)
show user profile  Nanne
I disagree. Blender fucks with my head, even the most basic stuff seems to be hidden away behind some obscure shortcut combination. I don't have time for all the guess work so I always end up giving up :P It would be fun to know Blender, but I don't have time to learn it on my own :)

Kristoffer Helander
  :: Works ::   |  :: Resumé ::   |  :: Contact ::   |  :: CG Blog ::   |  :: Links ::     
read 1472 times
5/6/2015 9:56:40 AM (last edit: 5/6/2015 9:56:40 AM)
show user profile  Nik Clark
I have to admit, I failed with it year after year because of the initial hurdle. I do think that a ten minute video could be made which would help Max users understand the different way Blender works, and how it's interface functions.

After swearing about the Blender interface for years, I now think it's great. It's much more flexible than that of Max, and the interface layout is saved with the .Blend file, which is also great.

"How the f*ck does this work? - A Blender introductory video for 3dsMax users".


read 1470 times
5/6/2015 10:00:52 AM (last edit: 5/6/2015 10:00:52 AM)
show user profile  Nanne
Haha! Brilliant title Nik! I'd love to see that! :)

Kristoffer Helander
  :: Works ::   |  :: Resumé ::   |  :: Contact ::   |  :: CG Blog ::   |  :: Links ::     
read 1460 times
5/6/2015 10:10:43 AM (last edit: 5/6/2015 10:10:43 AM)
show user profile  Bolteon
^ Like.

-Marko Mandaric

read 1459 times
5/6/2015 10:11:24 AM (last edit: 5/6/2015 10:11:24 AM)
show user profile  Coxy
Agree, do eeeeet.
read 1455 times
5/6/2015 10:12:40 AM (last edit: 5/6/2015 10:12:40 AM)
show user profile  BishBashRoss
Yep. Do it Nik! :D

read 1441 times
5/6/2015 11:00:48 AM (last edit: 5/6/2015 11:00:48 AM)
show user profile  ijzerman
Ayyy, ^like.

Pushing buttons since "86
read 1436 times
5/6/2015 11:14:39 AM (last edit: 5/6/2015 11:14:39 AM)
show user profile  gogodr
I think the community is big enough to kickstart a video series training for max users to use blender, or for the oh so wanted blender UI revamp.

I myself am another frustrated user who tried to get into blender but got scared away because of the UX in general.

Hello there

beautiful ;3

read 1427 times
5/6/2015 11:40:49 AM (last edit: 5/6/2015 11:40:49 AM)
show user profile  Sangre
At least you got past the splash screen.
read 1425 times
5/6/2015 11:46:13 AM (last edit: 5/6/2015 11:46:13 AM)
show user profile  Garp
If you can make the content as educative as the title, I want it too :)

read 1416 times
5/6/2015 12:33:22 PM (last edit: 5/6/2015 12:33:22 PM)
show user profile  Nik Clark
I'll see if I can motivate myself to put something together. I don't think you need to know that much to get going with it.

read 1413 times
5/6/2015 12:35:58 PM (last edit: 5/6/2015 12:35:58 PM)
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