multimatte element not correct displayed in vrayvfb

[max montana]

hi, i use the mmre to get masks of objects with a specific material on them. iin mmre i activate the checkboxes "vrayvfb", "rgbuf id on" (and determine the number of the desired mat id), and checkbox "madid". i get a mask for the red channel, which is perfect when i save it as a .tiff.
2 questions:
1.) in the vrayvfb the mmre are not displayed as they are when i open them in ps (they are splotchy and only displayed on the edges of the objects...)
2.) when i save them as .jpg the masks seem not to be antialiased.
why?

[instinct]

No idea for the first one, looks fine here.
As for the second question keep in mind that the MMRE has to rely on the sampling of the RGB pass. So if there is a lot of undersampling in dark/low-contrast areas then the masks will be undersampled too of course.

Regards,
Thorsten

[max montana]

but why the jpg. of the same mmre is much more aliased at the edges than the tiff.?