One of the first treatments that you will have to do to your VFX footage is removing lens distortion. This is crucial for some major tasks, like tracking, rotoscoping, image modelling, etc.
Copy lens information between different footage or between footage and 3D renders is also very common. Working with different software like 3D equalizar, Nuke, Flame, etc, having a common and standard way to copy lens information seems to be a good idea. Uv maps are probably the easiest way to do this, as they are plain 32 bit exr images.
- Using lens grids is always the easiest, fastest and most accurate way of delensing.
- Set the output type to displacement and look through the forward channel to see the uvs in viewport.
- Write the image as .exr 32 bits
- This will output the uv information and can be read in any software.
- To apply the lensing information to your footage or renders, just use a Stmap connected to the footage and to the uv map.