Need Help! Render times very different

Sat Jan 20, 2018 8:41 am

My render times in the Octane Live Viewer show around 30 seconds a frame, but when I go to actually render, the time per frame is upwards of 8 minutes. What's going on here? Is there a setting I didn't check? This is in C4D, WIN 7, dual xeon, with a single m6000 card.

Beppe OctaneRender™ Italia Blue Sky · Sat Jan 20, 2018 9:25 am

Hi carolinafilms57,
what about the different resolutions of Live View and Picture Viewer?
Also take care of the difference in geometry between LV and PV:
Performance Tricks and Pitfalls on Renderings
ciao beppe

Sat Jan 20, 2018 9:30 am

Two resolutions look very different. I hope you dont expect same or closer times.

Sat Jan 20, 2018 9:33 am

Interesting, I've never had this issue on other machines, the times tend to be very accurate of what the PV render time will be. What could I do to optimize the difference?

Beppe OctaneRender™ Italia Blue Sky · Sat Jan 20, 2018 9:53 am

Hi carolinafilms57,
in LV, press the Lock icon to render at the same resolution of PV, then compare the render time.
ciao beppe

Sat Jan 20, 2018 9:54 am

That's incredibly helpful! Thank You!

Beppe OctaneRender™ Italia Blue Sky · Sat Jan 20, 2018 10:52 am

You are welcome

Happy GPU Rendering,
ciao beppe

Tue Jan 23, 2018 9:38 pm

carolinafilms57 wrote:Interesting, I've never had this issue on other machines, the times tend to be very accurate of what the PV render time will be. What could I do to optimize the difference?

Just so you understand what's going on here...

Remember that what you are seeing in the live viewer is what's actually being rendered, not a version that has been rendered off-screen, then scaled to fit the window, as many other render engines do. So say you have your render res set to 1920x1080, but your viewer window is showing you 960x540. You can guess that when you do your final render, it's going to take about four times as long as what you're seeing in the live viewer.

The Lock icon forces Octane to render the image at the full res defined in your Render Settings and displays it to you 1:1, cropping to fit your window. It's still rendering the full res image, it's just showing you a section of it. It would be nice if we had the option to scale that full res render into a smaller window, but that's not what the Octane Gods have decreed.

My preferred method of working with this is to lock the resolution, then use the render region to get the fastest feedback on whatever element I'm focussed on. Now and then I'll turn off the render region option just to see how the whole shot is coming along visually, as well as speed-wise.

Beppe OctaneRender™ Italia Blue Sky · Wed Jan 24, 2018 2:48 pm

frankmci wrote: ...The Lock icon forces Octane to render the image at the full res defined in your Render Settings and displays it to you 1:1, cropping to fit your window. It's still rendering the full res image, it's just showing you a section of it. It would be nice if we had the option to scale that full res render into a smaller window, but that's not what the Octane Gods have decreed.
...

Hi frankmci,
when you enable the Lock icon, a new view multiplier box should appear, to let you zoom in and out of the full frame buffer:

ciao beppe

Wed Jan 24, 2018 4:24 pm

[/quote]
Hi frankmci,
when you enable the Lock icon, a new view multiplier box should appear, to let you zoom in and out of the full frame buffer:
ciao beppe[/quote]

Sweet! Thanks, beppe, I don't know how I've missed that for the last eight months!

- Frank