I created a bevel curved surface between a flat and upright plane. Trying to blend that corner and use it as a seamless backdrop to place object in front of it. Like what you see in professional photo Studios.Problem is that I keep seeing that line connection through the camera of the 2 planes meeting each other despite the bevel attempt. Even tried different lighting conditions to 'cover up' the line but no luck. I have attached 3 images. Any suggestions would be grateful.
Probably your camera clipping region is too narrow?
Try adjusting it from the Camera Properties > Lens menu
(You can check if the limits are big enough to encompass your scene by enabling Viewport display > Limits: see below)
P.S. I don't know what scene you have in mind, but from your screenshot it looks like your backdrop is veery big. Scaling everything down with respect to the world origin could be an option and wouldn't require changing the clipping distance.