Bit of time? I let run Painter to render his thumbs nails and during 30 minuts, it created I think 8 of 30 materials what I have in Painter, so what is point have possibility of custom materials from SD and then cant use them in Painter because Painter is not able create own thumb nail and during rendering one thumbnail ti took 5Gb of RAM because I dont know why, and Designer load that material during 5 seconds, and one thumbnail took 3-10 minutes to render thumbnail, and then somobody say you cant have too much own materials in shelf, I just killing time right now ( half of working day) because I make some changes to my own materials and Painter cant render thumbnail so I cant work.
I love Substance Designer and Painter, but this is another enoing think. So I must make rollback to 1.5.7 form 1.6 because 1.6 cant render thumbnails at all.
Edit: And also each new version of Substance Painter will rerender thumbnial, so every single new version I kill half of the day to waiting for thimbnails, I think guys in Allgorithimc should do something with this.