I have a 360-degree panorama(rendered in Blender) and want to composite a glare effect onto it. The problem is that once it is viewed in a 360 photo view the effect seems distorted due to projection distortion. Is there any way to compensate for this?
Example:
This is a 360° equirectangular panorama of a simple scene of a sphere with a glare effect
If you then map it onto a sphere, then render that sphere, it looks like this
Because the sphere is the same color as the background is it impossible to see, but if I map bright to red and dark to green to make it easier to see against the background and increase the contrast, I get something like this
You can see that the effect pinches the glare effect towards the poles.