Fresnel effect?

I’m having a hard time understanding what the fresnel parameter does when it comes to raytraced mirrors.

I know what a fresnel lense is (thats mostly the only information I can find on it), but how does this apply to reflections? Can someone reference a real world object in which fresnel is apparent?


try this sometime you’re at a puddle [or pool of water]

stand off beside it looking at the reflections at a glancing angle
then walk and look directly down on it at your reflection

you will be able to see the reflection a lot easier at a glancing angle than when looking straight down on the water, this is the fresnel effect and the fresnel paramater can alter how that effect works.

Excellent, thanks z3r0 d, and Enzoblue, that helps a lot! :slight_smile: