This pattern was initially inspired by Styrofoam ceiling tiles that I found online. I really liked the aged look that this particular pattern was going for , and ultimately made it metal, because the reference looked like it was trying to achieve a faux metal look. This material is completely procedural and there are controls to allow the user to change the pattern in the sbs- (first image). It was developed in Substance designer and rendered in Iray with MDL. The sketch fab scene uses the PBR material module available.
Perception Floral Burst - Substance Designer