[eldo]

Hi everyone - it's been a while i think.

I'm currently working in a new environment and finally had the chance to get my hands on V2. Very nice improvements.

I need the thinSSS feature for a project that i'm working on.. i basically want to create a realistic 100€ banknote.
The geometry is a thin box (!), not a plane - as i have to be able to map it on both sides. So this is what happens when using thin SSS:





The transmissive samples seem to be inverted in color.. why? it also occurs when i use a plane. I tried to invert the respective material channels - it didn't help.

here's a screenshot of the material:




i am thankful for all hints to solve this..

[Hervé]

forget the box... make 1 poly... copy it... invert the normal of the copied poly... seperate these 2 polys with a tiny space... like 5um

if you go for the box solution, normal sss then.. but it will take forever..

h.

[eldo]

funny thing is: the color inversion also occurs when i use normal SSS on the box
plus it happens when i use a plane as well..
so the two planes & thinSSS approach won't help much.

Thanks anyway Hervé.. you're doing some great renders btw!

[Hervé]

mmm.. not sure.. what happend if you make for both mats. (face & back) with a gray color for scattering.. no map..just 180,180,180 gray.. only use your map in Transmittance..

let me know if that helps..

(thanks for the sweet words..)

[eldo]

i tried with desaturated maps already.. didn't work.

I nailed the problem however.. i was just too dull it seems. I tried to use only one BSDF layer.. working with dedicated Layers for 'Diffuse' and SSS however works just fine.. also the thinSSS seems to work on boxes too. (well.. i guess that's the least you can expect from a feature like that).. now i just have to make a thickness map and i'm settled.

will post result later.