Hi,

Looking for most elegant/preferred way to approach adding overscan to allow for lens distortion in post.

Render settings offers "Data Window NDC" and rollover help suggests using this, so I dial in (-0.05,-0.05,1.05,1.05)

Reading into nuke and the bounds are expanded as I'd expect, but the picture is scaled up by the same. So feels like I'm missing the "Screen Window Size" setting to adjust that back. I can modify the camera's aperture to correct. Doesn't feel like the right way to do it.

How are people doing this? Ideally this is would work for any delegate...

Check out the tutorial "A Beautiful Game" Part 10 deals with overscan setup (and the caveats) for Karma.
https://www.sidefx.com/tutorials/karma-a-beautiful-game/ [www.sidefx.com]

Anyone knows a way to do that more easily on 20.5?
It should be a way by this point right?

mzigaib
Anyone knows a way to do that more easily on 20.5?
It should be a way by this point right?

Karma Render Settings, Image Output tab, Aspect Ratio subtab.
Data Window NDC should show four fields representing the borders of the image and reading 0,0,1,1 (left, top, right, bottom). Enter how much you want each side to overscan.

For example, if you want the left and right overscanned by 10%, those fields would read -.1,0,1.1,1. If you want all sides overscanned by 20%, they'd read -.2, -.2, 1.2, 1.2.

Thanks for the feedback
I was hoping for a easy way like to just type 10% overscan and resolution and window gets updated automatically without having to making expressions a built in mechanism for a thing that is just trivial.

This is too complicated.
I hope this will be changed by Houdini 2021