How exactly does "multiply by front diffuse" option work ?

[AltoR]

Hello all,

I upgraded today to last VRay 3.10.03 with 3dsmax 2015 x64 and I have a question regarding the new “multiply by front diffuse” option of the VRay2sidedMtl: in fact, I am looking for help but I can’t find anything related to this option on the official VRay online help.
So I made some quick render tests with tree leaves, but these are not very probant: this option does not behave the way I was expecting, leaving me in confusion …

Can anybody help me please ?

Thank you,

[tashko.zashev]

When this option is enabled, V-Ray multiplies the color RGB/texture of the back material by the front one.
Here are two screenshots with example render result:

I will make a note to update our online documentation. Thank you.