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So I thought to share couple of tricks that helped me alot to achieve higher rendering speed with IRAY in DAZ
Though most of the experienced Artists must be well aware about those quickies already.
It may help newbies or artists who are having old NVIDA GPUs or not so high end PC (like me)

Here are some of those tips -

1. Iray Uber shader 
For IRAY to work fast and best, every object must be converted to IRay Uber shader. if an object/model doesnt have IRay presets, then convert its shader to Default IRAY Uber shader without replacing its images of course!

2. Smaller Texture size- This is just my personal experience for clothing & other 3D objects, keep your texture tiling to minimum, especially when texture images are of low res.

3. On the Render Settings - Optimizations Menu - Set the Instant Optimization  from 'memory' to 'speed'

4. if you are rendering a Close up shot and you want to highlight Models instead of background. Its better to enable DOF on main camera. I found it increases Iray speed to 2x times.

5. Make sure to render couple of draft images on smaller scales or low res initially before rendering final image

6. On Rendering Settings > Advance Tab > Enable OptiX Prime Acceleration . 

7. Connect Monitor to your PC's motherboard on board /integrated graphics port. This way you totally free up card's memory to store more objects & textures

Do share your experience. Happy Rendering! Enjoy!
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:icondrdancm:
drdancm Featured By Owner Mar 19, 2017  Hobbyist Photographer
Thank you very much, I do have a question though.
How do I convert all objects or iRay ?  Is it done object by object or can it be done for all objects at once?

Thanks,

Dan
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:icondhruv3d:
Dhruv3D Featured By Owner Mar 25, 2017  Professional Digital Artist
Select all objects and change their shader to default IRay Uber shader in surface tab 

Cheers
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:iconchambolic:
chambolic Featured By Owner Dec 12, 2016
Thanks for the tips.

#7 : I have an Intel Skylake i7 which has a GPU bulit-in so I use the motherboard connector for the display. I read somewhere that the saving is +/- 500MB VRAM. On the other hand, my GeForce 970 is supposed to have 4GB but there's some debate about whether it only uses 3.5 of that 4. I'm not sure but 4GB is proving to be a severe limitation.

If anyone knows any good tutorials on using IRay canvases to render out in layers then composite together, I'm very interested to see them.
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:icondhruv3d:
Dhruv3D Featured By Owner Dec 13, 2016  Professional Digital Artist
Not that I am aware of any limitation. I think it will max out if the objects or scene occupy more than 4gb of memory.
I generally refer the DAZ app logs to check memory hogged by last renders.

for canvases I suggest you try searching on DAZ forums there are few interesting ones posted by seasoned artists.
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:iconratorama:
ratorama Featured By Owner Dec 9, 2016  Professional Digital Artist
I thought DOF would slow down the render time. Thanks for the tips! ;)
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:icondhruv3d:
Dhruv3D Featured By Owner Dec 13, 2016  Professional Digital Artist
It doesn't in my case. logically also it shall speed up by rendering only DOF objects in detail, and it would blur objects outside DOF plane.
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:iconratorama:
ratorama Featured By Owner Dec 14, 2016  Professional Digital Artist
Glad to know that. Thank you! :)
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:iconjasongalterio:
JasonGalterio Featured By Owner Aug 29, 2016  Hobbyist Digital Artist
Out of curiosity, does #7 really make that big of a difference? It seems a little counter intuitive.
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:icondhruv3d:
Dhruv3D Featured By Owner Aug 30, 2016  Professional Digital Artist
Yes it does ! It keeps your dedicated GPU memory free.
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:iconjasongalterio:
JasonGalterio Featured By Owner Sep 1, 2016  Hobbyist Digital Artist
Interesting. I am going to need to try that this weekend. I have two video cards in my system, along with the onboard one. And I have noticed that there is a difference in speed if I output to just one and render on the other.
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:iconashleytinger:
ashleytinger Featured By Owner Jul 21, 2016  Hobbyist Digital Artist
going to give these a try :)
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:icondhruv3d:
Dhruv3D Featured By Owner Jul 21, 2016  Professional Digital Artist
Sure, Thanks :) 
Reply
:iconjanus3003:
Janus3003 Featured By Owner Jul 21, 2016  Hobbyist Digital Artist
I really need to start doing #5 more often. Too many times I've rendered an image, only to find a mistake I overlooked. Nice tutorial!
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:icondhruv3d:
Dhruv3D Featured By Owner Jul 21, 2016  Professional Digital Artist
Thanks alot :D
Reply
:iconchris3drender:
chris3drender Featured By Owner Jul 21, 2016  Hobbyist Digital Artist
These are good tips. Number 5 is more a general time saving tip but still useful. For number 3, it may be set to speed by default. I know one of the earlier releases it was because memory caused it to crash all the time. Still a good thing to suggest to check though. My only questions is does your first tip only apply to things that need to be converted to iray shaders or does it apply to things that have an iray setting already as well?
Reply
:icondhruv3d:
Dhruv3D Featured By Owner Jul 21, 2016  Professional Digital Artist
Thanks alot. :)
For Low memory NVIDIA cards. One may set it to memory optimization when a scene is being rendered on HD+ res with too many objects. That can avoid IRAY to getting crash.
Yes #1 is applicable for objects with 3delight shaders or materials.
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:iconanglu:
Anglu Featured By Owner Jul 20, 2016  Hobbyist General Artist
Will try this, thanks!
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:icondhruv3d:
Dhruv3D Featured By Owner Jul 21, 2016  Professional Digital Artist
sure , let me know how it goes :)
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:iconkadaj777:
Kadaj777 Featured By Owner Jun 22, 2016  Professional Digital Artist
Thanks for the info. :)
Reply
:icondhruv3d:
Dhruv3D Featured By Owner Jun 23, 2016  Professional Digital Artist
Glad you liked it :)
Reply
:iconartmatrix:
artmatrix Featured By Owner Jun 20, 2016  Hobbyist Digital Artist
Nice tips ;)
Reply
:icondhruv3d:
Dhruv3D Featured By Owner Jun 20, 2016  Professional Digital Artist
Thanks :)
Reply
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