overscan render by 10%

[R_Cyph]

Hi,

I'm using vray for maya 2.x. We're trying to render an overscan by 10% resolution without distorting any of the camera settings. I've read a few posts but none seem to give suggestions that work :P

[Neilg]

edit:

if you have an image of 640 wide, and you want to widen it to 800, you divide the old value by the new one (640/800 = .08 ) then times that result by your old lens width (eg 30mm*.8 = 24mm)

[R_Cyph]

If I crop back down to 640 from 800 after render would I get the exact same result?

[Morbid Angel]

no need to touch the lenses on the camera. In maya there is a camera scale, it does exactly what you need. Its set to 1, if you wish to overscan it by 10% you will set it to 1.1 and change your resolution accordingly.

[Neilg]

If I crop back down to 640 from 800 after render would I get the exact same result?

yes, assuming you're not using distortion.

[R_Cyph]

We're not using distortion. Thanks!

[Metzger]

no need to touch the lenses on the camera. In maya there is a camera scale, it does exactly what you need. Its set to 1, if you wish to overscan it by 10% you will set it to 1.1 and change your resolution accordingly.

Camera scale is bugged depending on the build you are using.

[Morbid Angel]

we've used it extensively on several projects without any issues.

[Yannick]

Camera scale is bugged depending on the build you are using.

I second that. The one we now have seems to work as the previous one didn't.

[Metzger]

It seems to be fixed in recent stable builds up to 2 months.

[kweechy]

If you're using an older build, post-scale functions properly I believe.

Post scale of 0.90909 will give you a proper rendered result with the resolution dialed in @ 10% overscan. Camera scale is more elegant since you don't need to whip out a calculator for reciprocals, but oh well...