This is an extension of MCPE-156577.
This problem happens after I loaded an RTX pack but turned off ray tracing. When you enter the world and turn ray tracing on, you can see the black skin.
MCPE-156577 has been fixed, but it seems that the problem is not fixed completely.
Steps to Reproduce:
Activate an RTX pack in Settings > Global Resources
Navigate to Settings > Video and make sure that the Ray Tracing option is disabled
Open a world and enable RTX
Look at the player's skin
Observed Results:
The player's skin is completely black.
Expected Results:
The player's skin should look the same as it does when RTX is disabled.
I can't reproduce this with my texture pack (Defined PBR - A Vanilla RTX Resource Pack 1.1.8). Please attach your texture pack.