multimatte and vrayblendmtl, no soft edges!

[super gnu]

ive got a scene using vrayblendmtl to mix between different terrain materials. driven by distance tex, with invisible geometry to define the different areas.

this works fine, and i have a soft edge between the materials due to the radius of the distance tex.

however, the multimattes i have for these various materials (using materialID) have hard edges.

this is not good!

how to resolve this issue?

[super gnu]

so the only element ive seen that isolates the material correctly is vraymtlselect..
... not ideal since i need one for each material, but itll do.

[^Lele^]

There is a pending Jira about this (VMAX-10476), i'll bump it with the devs.
p.s.: this has always been the behaviour, btw.

[^Lele^]

Update on this: it's a complex affair, not easily solvable (it'd require important changes to shaders to work.).
You're better off with material select REs for the time being.