
I want to know if its possible to blur or make the transition from shadow to lit area (i guess its called the shadow terminator ? ) more smooth, without changing anything in the scene(e.g. lights) except the shader.
I know that luxcore has diffuse roughness, but that produces not the desired effect.
On this forum i found a couple of example comparisons by the user (Fluss) :
https://corona-renderer.com/forum/index ... #msg120362
Every renderer there behaves the same, which is probably physically correct, but the look i am after can be found in this image :
https://corona-renderer.com/forum/index ... 9194;image
The top half has a harsh line between shadow and lit area (meh), the bottom half has this nice soft falloff (great).
On another forum i have found a user (kosso_olli), who made a comparison between vrayrt and fstorm:
Fstorm
https://forums.chaosgroup.com/filedata/ ... 1471338786
VrayRT:
https://forums.chaosgroup.com/filedata/ ... 1471338796
Due to the nice soft falloff the fstorm image gains alot of depth, see the cushion part at the bedhead or the pillow in front.
In constrast the vray rendering looks pretty flat.
My guess is that this behaviour isn't physically correct, but is it possible to emulate it with some clever shader node setup or normal map trickery ?
Does somebody have any hints or ideas regarding this ?
Thanks in advance
