Whenever I try to adjust the material settings for 3d objects Photoshop CC crashes. Notice also the shadowy artifacts around the 3d object. I had no problems with 3d with previous Photoshop versions before CC 19. CS6 still works perfectly. The video below is Photoshop CC v20.0.1.
You are sending dumps to adobe and Adobe reported on their feedback site they know there is a problems in CC 2019 3D processing and are working on them. I can change the bumpmap texture in CC 2018 only CC 2019 crashes. CC 2019 seems to have many issues. Many CC 2019 bug report have no Adobe comment on them in however, 196 problems have been acknowledges and some are being worked on.