Limited Region on larger render hang

[sherridge101]

Hi all

When I render just a small section of a large Image (say 9K), the frame buffer renders the limited region fairly quickly, but then I get the spinning beach ball.
There are no other render elements, other than the Sample rate, but I do have glare on.

For small crops of large resolutions (to check what the small areas will look like at 100%), I?m looking forward to the ?scale? within the Frame Buffer function, as seen in 3ds Max.

Cheers

[svetlozar.draganov]

It's most likely because of the glare, Lens Effects are always applied to the whole image so even though you are rendering a small part of the 9k image at the end V-Ray needs to calculate Lens Effect for the full resolution and that might take a while.
Other factor that could slow the things down is the image save, again even with region render V-Ray will save the full image to the HDD unless Don't Save Image checkbox is enabled.

[sherridge101]

Cool, cheers.

Do you know when the camera zoom will be available in the Frame Buffer?
To avoid rendering the 9K image, just to see the limited region.

Cheers

[yolov]

We do support 2d pan and zoom (in maya camera's settings > Display options > 2D Pan/Zoom). It should be more or less the same thing, only with the controls being in the camera shape's attributes. Would this work for you?

[sherridge101]

Hi Alex

Yes, this sounds good.

I guess if we have the test render set to say, 25%, then the Zoom could be 0.25 to mimic the res at 100%? avoiding the overhead of the 100% render size (if that makes sense).

(have posted that the new nightly cancels out all test render resolutions - only rendering at 100% size, so this is would not work currently).

Cheers

[yolov]

Yes, we already have a note about the test resolution.