How to speed up something in a scene

pkappetein

I rendered a scene, which took me about 2 hours.
Now there is a cabinet in that scene, where I made an Animation of the doors moving.
If I start to render, i don't want to do 60 images x 2 hours  (2 seconds).
So I thought I will remove items in the room, to speed it up.  But that didn't seem to help much.
So I deleted everything, except that cabinet, but it seems to loose all the lightening as well from the windows/floors/wall.  , so I added those back in,  and now it's still
taking a long time to render an image for just that cabinet. door.  about 90 min.
What can I do, to just render the moving doors (since i can use an overlay later on, to combine it)  and gain a lot of speed in rendering for it
If I just use those doors,  I loose all the lightening in the scene, and it get's all dark etc.
Any suggestions?

Thank you

ShawnBooth

I recommend patience. Sometimes, it's the only thing you can do (in the world of 3D). You can also upgrade your hardware, build a render farm or rent time on one. You can also remember that we're lucky to have the ability to do this at all (thanks to Daz). Daz is free and easy to learn. If you consider the infamous triangle: Quality, Cost, Time - pick two, Daz is free (cost), and IRAY = high quality. Means time required sucks most of the time.

My current render is nothing more than a character and lights, and it's going on over 7 hours...

Image removed http://www.daz3d.com/forums/discussion/3279/acceptable-ways-of-handling-nudity#latest

Griffin Avid

I suggest messing with the rendering settings.

Maybe even less frames per second.

I grabbed an iray product that came with a bunch of presets.

Draft is the lowest and when set to photo-real as opposed to interactive, I think it looks good. Up close, there are little white 'unrendered' pixels, but I render large and shrink the scene down. looks good enough to me.

The disclaimer is I havent tried animation yet.

Render Studio Iray

http://www.daz3d.com/render-studio-iray

Details
"Inspired by the quality and power of Iray, 'Render Studio' is packed with everything you need to produce incredible Daz Studio character renders. Including a full set of mesh and photometric lights that are complimented with many different colors and real world light temperatures. This set also includes three FX projectors with tonnes of projections, a background and floor prop and a classic Infinity Cove studio prop. Both props come with a multitude of texture and shader options.

Five pre-set, ready to render scenes (Just add figures) are also included. Along with a full selection of Iray render settings from an extremely fast 'Draft' setting to a full production 'Ultra' setting. A 10 page PDF usereguide is included to help you get up and running within minutes."

pkappetein

It's not the animation..  I am talking about 1 frame, that takes 2 hours.  if I need to to 60 fames = 120 hrs.

All I need from the whole image  is a cabinet, where i want the door to open / close.

so i disabled everything else (hide it)  but didn't make a difference in rendering time.

So I deleted all the objects.  but then I lost all the lightening parts that came through the window.   so If i leave just the windows in there,  then still  it's all  dark, 

idk if I can disasemble the cabinet. (i tried deleteing parts, but it deletes the whole thing..  I couldn't find a way to make all the items seperate?  they must be grouped or linked with eachother.  and then see if i can re-create a simular light for it, so it doesn't look ackward.

 

hphoenix

You have three options, if you must do it in Iray:

A)  get some high-end GPU cards to speed up rendering of the scene (or network rendering nodes).  This is expensive.

B)  reduce the complexity of the scene (simplify shaders, simpler texutres, less geometry, simple lighting, etc.)

C)  reduce the resolution (size) of your frames.

 

But the simple fact is that rendering animations takes a lot of time.  If you simply can't wait, change to either 3DL (with no AoA or UE lighting/shaders) or OpenGL renders.

They won't look as good, but they will be faster.

(edit:  Note, if a simple cabinet prop is taking 90-120 minutes to render, something isn't right.  It would help if you could tell us what items are in the scene, a better description of how the scene is lit, etc., to help us track down what's making the original scene take so long to render.....)

 

pkappetein

It's the Westpark Threatment Room Iray.

I leave all the settings default from the scene that i load,  and have a default camera pointed to the cupboard on the left where you walk in.

I have a Nvidia 1070 with 16Mb on it.  latest CPU and 64 Gb Ram.   so that's not the issue.
Some other scenes from Westpark I can run in 10-20 min.  Iray.  but that scene  is causing me headaches.  Played with the lights etc, but nothing seems to matter.

I attach my Duf file, in case you have that scene. Don't pay attention to the typos for the Camera's lol..
 

fastbike1

@pkappetein  "I have a Nvidia 1070 with 16Mb on it."

Where do you find that? That's more Vram than a TitanX.

pkappetein

https://www.asus.com/us/Notebooks/ROG-G752VS ;

got it from here :)

http://www.hidevolution.com/asus-g752vs-xb72k-oc-edition.html    

Thomas Windar

If you are willing to lose quality in exchange for time, you can do this:
- Go to your render settings.
- Go to "Progressive Rendering"
- Turn "Rendering Quality Enable" to OFF (this will tell Iray to rely on Max Samples instead of Convergence)
- Set Max Samples to a lower value.

Default samples is 5000, but you can try setting it to 100 and see how it looks and how much time it takes. Increase the number to a higher count like 200, 500, 1000 etc. to enable better quality at the cost of render time.

Also, be aware that bigger renders will take a lot more time. A 1600 x 1600 image will take a lot more time than 500px x 500 px one. 

 

Outisde of that - there is literally nothing you can do to speed up your render times outside of BETTER HARDWARE. 
You'll have to decide whether you prefer quality or your time here. 

Ostadan

I find myself frequently telling people lately that rendering is an example of the adage: "Better.  Faster.  Cheaper.  Choose two."  That's not strictly true, of course (due to tech improvements), but close enough.