Alder - Photometric Stereo based PBR Veneer Material

This alder (Pacific Coast, USA and Canada) is a very interesting veneer from roughness point of view as it is an example of surface with very unique roughness/specular which isnt really clearly represented in albedo, therefore cannot be generated from albedo properly.
Polarisation based subtraction seems to be really the only way to get proper values in this case.
As usual capture is based on 16 images. To capture roughness I took two additional images with AR400 ring flash light - 1 cross and one parallel polarised and subtracted one image from another.
Image misalignment caused by camera micromovement were manually corrected in Affinity Photo. Additional 16 images for Photometric Stereo reconstruction were captured with the AD 200 Pro flash in TTL mode. PBR data was generated in Details Capture.
Color was adjusted to match value measured with color spectromenter. For those interested to get list of values for different materials I shared them in this video:
https://youtu.be/TcTh-1X2FsQ
Cheers!
G.