When loading up a world or joining a server with RTX off then press colon ';' to turn on RTX, the PBR textures will fail to load properly. This only happens after the game is first loaded, and if RTX is turned off when joining.
Steps to reproduce:
Make sure you have an RTX-enabled pack installed and meet the system requirements for RTX in bedrock...
Go into the settings and make sure RTX is Off
Restart the game
Find yourself a server to join, a friend to connect to, or a singleplayer world
Join the world
Press ';'
Watch as the PBR textures fail to load
RTX pack used in testing: Radiant Pack RTX by Lioncat6
Thank you for your report!
We're tracking this issue in MCPE-152158, so this ticket is being resolved and linked as a duplicate.
If you would like to add a vote and any extra information to the main ticket it would be appreciated.
If you haven't already, you might like to make use of the search feature to see if the issue has already been mentioned.
Quick Links:
📓 Bug Tracker Guidelines – 💬 Community Support – 📧 Mojang Support
📓 Project Summary – ✍️ Feedback and Suggestions – 📖 Game Wiki