OTOY Forums

Dear developers, any plans on implementing this?
https://lesterbanks.com/2015/07/underst ... ea-render/

Examples describing the issue:

As a workaround, can you put a falloff node into the roughness slot? Granted, it would be much nicer to have the option in material (wouldn't get your hopes of this happening)but maybe this is a workaround?

itsallgoode9 wrote:As a workaround, can you put a falloff node into the roughness slot? Granted, it would be much nicer to have the option in material (wouldn't get your hopes of this happening)but maybe this is a workaround?

This is what I did creating those examples (using falloff). Thea render has it built in with two simple controls. I would prefer this than a workaround solution.

Yep, a certain competing renderer (wink wink) has solved this nicely by adding an extra parameter right next to the glossiness / roughness material properties named Angle Affect. Very useful

Interesting, any papers or other scientific material on this? Describing exactly how it should function?

J.C wrote:

itsallgoode9 wrote:As a workaround, can you put a falloff node into the roughness slot? Granted, it would be much nicer to have the option in material (wouldn't get your hopes of this happening)but maybe this is a workaround?

This is what I did creating those examples (using falloff). Thea render has it built in with two simple controls. I would prefer this than a workaround solution.

gotcha. Yeah, i agree with you that this is needed badly.

Phantom107 wrote:Interesting, any papers or other scientific material on this? Describing exactly how it should function?

Microfacet BRDF has been around for quite sometime now.

Chaosgroup has a nice little post about it.

https://www.chaosgroup.com/blog/underst ... sy-fresnel

Here is a list of engines that does this already that I know of so far
Vray
Corona
F-Storm
Thea Render
Arion/Maverick