No preview of fabric material in pictureviewer and lack of reflections on wood.

[Marcin Kasperski]

Hi guys, I have this problem with the latest version of Corona and Cinema. R19 and Corona 2017-10-09 version. I got this material from https://www.corona-materials.de/…/ma…/fabric/fabric-light/88 and in the pictureviewer it's black, like there is no preview, same thing when I render a region but it's ok in IR and Corona VFB. And there is another thing, lack of reflections on wood material. The one with reflections is made with R16 and the other one is R19. Wood mat is also from here https://www.corona-materials.de/en/material-library/wood/black-ash/199

I'm using HDRi as my main light.