Feature request: Lensflare effect

[MoritzBru]

A Lensflare effect would be cool to have and add a more immersiv feeling.

Examples:

• https://krpano.com/plugins/userplugins/lensflare/example/_vr/index.html
• https://threejs.org/examples/webgl_lensflares.html
• https://www.babylonjs.com/demos/lens/

However, I do not know how complicated it is to implement this.

[Joebayld]

I would be interested in this as well. I could work on this - not sure how we want to attach it to the scene though.