What is Diffuse Reflection?

In this episode, we define a new name for our refracted light that is commonly used with the industry.

[@PatrickFrom]

Already enjoying watching these videos, currently working with PBR in my own OpenGL Renderer and I'd like a better understanding of light aswell to understand the how and why's. So thanks for making these videos, time to keep watching them :)

[@GetLearnt]

My pleasure! Glad they're helpful, especially when making your own renderer! :)

[@sebsebseb523]

that is, is the probability of light being absorbed less in smooth reflection?

[@sebsebseb523]

btw thx lots of love from turkey

[@GetLearnt]

Unfortunately I only really have a surface level (pun intended) understanding of light and optics, so I truthfully am not too sure? You may be able to find some papers written online about this kind of thing, tho! Thank you for checking out the video. :)

[@sebsebseb523]

@@GetLearnt alright , thx again and have a nice day :)

[@IGarrettI]

Is it the same as sub surface scattering?

[@GetLearnt]

Good question! Yes to a degree, they are really just separate points on the same chronological process. Subsurface scattering is the process where light is able to enter an object, scatter around a couple times and then exit the object at a different spot. It is scattering light rays underneath the surface of matter. Upon exiting the surface of the matter, we perceive it as "Diffuse Light". So subsurface scattering is doing all of the bouncing underneath, but once the light returns from underneath it is diffused light. Otherwise, we consider the light to be absorbed. Subsurface scattering will only (for the purposes of what we are working with) produce absorbed light or diffused light. But we can look at it this way. Basically think of a book. It has a beginning, middle and end. The beginning is the light that enters an object as specular light. The middle is when it is then scattered around subsurface (underneath the surface). Our ending, if the light makes it this far and is not absorbed, is what we see as diffused light. Each light ray has its own story, some with an untimely demise as absorbed light... :D I hope that provided some insight and didn't just confuse you more!