Lens distortion maps

[Neilg]

Does anyone have any lens distortion maps they'd be kind enough to share?

Doing a cg animation with a 2.35:1 aspect ratio, and I am realizing that wide lenses in cg dont work like anamorphic lenses do in real life - real ones pull the center of the wide image closer without affecting the top & bottom or the vertical lines, but physical camera distortion in vray is a big circular warp. A little bit of distortion top & bottom is fine & expected, but big C shaped verticals is a no go.

I found a website which shows an example of what I want - their figure 3 & 4 on here - http://www.decarpentier.nl/lens-distortion
show the effect of flattening out a super wide shot without appearing distorted.

Is this something that can be rendered out of the box? & if so, how?

[Neilg]

Here's a real time example that works in a browser from the same link.

http://www.decarpentier.nl/downloads...ion-webgl.html

I guess the control I really need in vray is that cylindrical ratio?

[cheerioboy]

Does the Distortion in the VrayCam not do it? Looks like you can do some simple distortions.
https://docs.chaosgroup.com/display/...ple:Distortion

I had also made a few before but they weren't for super wide lenses. 20mm was the widest.
http://forums.chaosgroup.com/showthr...ray-lens-files

[Neilg]

I dont have access to an anamorphic film camera & lens to generate one... the link in my second post shows the effect i'm after really well. having as little of the 'cylindralratio' in that as possible is how vray/max distortion currently looks.

Switching the camera type to cylindrical (point) in the vray settings with distortion set to .1 or so almost does it - but it also squashes the whole image down making ceilings look lower. I could render this and pop it back out in post, then re-crop it, but that's wasteful and makes it difficult to work with preview renders.