Demension differences between Octane and Standard renders

[josteen]

I've rendered out a beauty pass from Octane, and I thought I'd save time and render out Motion Vector pass using the standard render to use in After Effects, since there's problems doing so in Octane V3 from what I gathered on the forums. Problem is, when I do render out from the C4D Standard render engine, the image doesn't line up properly with the Octane pass. I was running into the last night with Object Buffers as well (this was before I looked up Render Layer Masks in Octane). If I scale the renders from the Standard on the y axis to 112% it gets pretty close to the Octane image, but it's not perfect. Does anyone know why this would be? I'm still very new to to Octane, and haven't been able to find any thing on the message board about it.

Thanks,
john

[aoktar]

I don't know any problems like this. Octane output vs. standard render output should exactly matches for perspective and objects. Double check your camera parameters.

[zoppo]

In Vray this problem occurs because Vray uses a "real world" camera lens model and its distortion and C4D's renderer uses a pinhole camera without distortion.
ATM I can't test it but maybe Octane also uses a real world camera?

[mesut]

the naming in c4d-octane "thin" suggests, that it is a "thin lens" camera (as it is in vray).
vray, though, has the option to choose "pinhole" - rendering it possible to match c4d's camera.
would be great, if octane also would have this "pinhole" option.

[Liketheriver]

Hi josteen,

check these values in the thinlens tab of octane camera tag:

Aperture aspect ratio and pixel aspect ratio: 1
Perspective correction: unchecked
Distortion value: 0

also, do you have a glass in front of the camera?

bye
LTR