Advanced fading effect

Hello,
I need to create some advanced fading effects like wipe or clock. I know how to do a simple fading but what is the best way how to do these type of fading effects. Is there any librarty that would take care of that?

Thank you :slight_smile:

Thank you for the links but actually I would like to blend between two textures instead of changing view of two cameras. So I need some shaders that are doing these kind of effects between two textures.

Thank you