Disable bitmap filtering for Flakes?

I’m having an odd problem: using a Vraycarpaint shader and it seemed to be going fine, looked good in RT and also in some renders. Along the way something changed and now the flakes render as bigger blobs and I can’t get them to a nice sharp state anymore.

I disabled 'filter bitmaps" in the Global Settings rollout and that brought back the sharpness and made Vray match RT again - but that destroys my other bump maps so I can’t use that function.

Is there a way to disable bitmap filtering for the carpaint material and flake materials only?

/b

EDIT: here’s the difference. Originally I had it with the bump texture of the “filter on” and the flake sharpness of “filter off”. The flakes always look sharp in RT so I think RT is somehow not filtering them no matter what.

Figured it out: there seems to be a bug/glitch with Blow Up rendering. If I render crop/region/ or normal the flakes are fine, but if I do any kind of blow up render they get blurred out /heavily filtered.

That’s a general issue with blow up rendering; currently textures are filtered based on the original image resolution, and not on the blow-up region.

Best regards,
Vlado