Defect: Random color feather

Problem

Description:	Hello ! We are trying to make random colored feather and facing some problemes. I've tried to reproce a simple scene here. 2 feathers with 2 differents modelisations & 2 differents shaders A basic ox distribution + a msh from strand and a multi sub material. When the MFS is in 'custome proxy mesh' the referenced shader is not use. It works wihen the MSF is in prismatic or flat bilboard.
Steps to Reproduce:
	Attached Files: Ox_RandomFeather.v02.JPG (38778 bytes), Ox_RandomFeather.v02.max (548864 bytes),

21 May 2020 #27414
TAT Studio	Forgot to say tested with 3dsmax 2020.3 & Ox 6.2.3 & 6.3.4 http://tatprod.com/
21 May 2020 #27415
TAT Studio	-2nd problem- another same scene, but closer to our workflow (aka not a mesh from strand but a ox_scatter) how to scatter 2 shaders (red & blue) on 1 feather ? Attached Files: feather2.v02.max (487424 bytes), http://tatprod.com/
21 May 2020 #27416
TAT Studio	-3rd problem- Maps are badly redistributed. Here a ramp horizontal is finely scatter while a vertical ramp is not working. (images 1 & 2) Same thing with a checker (image 3) Attached Files: http://tatprod.com/

Summary