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Here we can see the active samples during render region. You'll see in the image bcos amount of the samples change depand on the region size.

kubicki3d wrote: Justavisitor, what versions of Blender Octane Edition and Octane Server are you using?

I use the latest versions of both, Win 8.1, 2xTitan.

Here are screenshots showing 'Region render' and full render.

The full image renders in 9 seconds - a small region takes more than a minute:

Indeed, I've made a test on a furry scene and got the same result. The smaller the region, the longer it renders - this might be some kind of a bug...

You can't judge the speed with samples per second, as it's an average of the total area being rendered (includes easy to render areas like the background). If you zoom into a difficult area to render you will get slower samples, but it will render faster. You really need to time the render and see how fast the noise is resolved to get a good indication of render speed.

grimm wrote:You can't judge the speed with samples per second, as it's an average of the total area being rendered (includes easy to render areas like the background). If you zoom into a difficult area to render you will get slower samples, but it will render faster. You really need to time the render and see how fast the noise is resolved to get a good indication of render speed.

Did you see my screenshots?

kubicki3d wrote:Indeed, I've made a test on a furry scene and got the same result. The smaller the region, the longer it renders - this might be some kind of a bug...

Thank you for taking the time to check it - I'm glad to see we get the same result (though I obviously hope it can be fixed).

justavisitor wrote:

grimm wrote:You can't judge the speed with samples per second, as it's an average of the total area being rendered (includes easy to render areas like the background). If you zoom into a difficult area to render you will get slower samples, but it will render faster. You really need to time the render and see how fast the noise is resolved to get a good indication of render speed.

Did you see my screenshots?

Your screenshots don't tell you how fast the noise cleared up. Looking at your screenshots I can see that the region render has much less noise than your full scene image. You could have stopped the region render much sooner than 100 samples and had the same quality image.

grimm wrote:You could have stopped the region render much sooner than 100 samples and had the same quality image.

That doesn't change the Region Render vs. Full Render-ratio - please see the new screenshots:

Region render: 8.37 seconds. Full render: 1.79 seconds.

And yes, the region render is obviously cleaner, but the point in region render is not to get a cleaner render that takes 4 x longer time than a full render.

The point is to get a fast partial render - while showing the previous full render simultaneously, as shown in the Octane Region Render video I linked to.

It's counter intuitive, but to get the same quality for the full scene as the region you need to render it up to 100 samples. Looks like you could even lower the number of samples in the region render, try 8 samples or even lower. At 10 samples the noise in the full scene is really bad, but not so bad in the region render. Don't think samples per pixel, think image quality.

grimm wrote:It's counter intuitive, but to get the same quality for the full scene as the region you need to render it up to 100 samples. Looks like you could even lower the number of samples in the region render, try 8 samples or even lower. At 10 samples the noise in the full scene is really bad, but not so bad in the region render. Don't think samples per pixel, think image quality.

Thanks for the explanation grimm - all's clear now
Cheers,
Szymon

EDIT: Justavisitor, I agree with you, it would be really nice to have region render working in Blender like in Standalone...