rendering artifacts on screen

I captured the attached screenshots in the Northern Forest this morning. System details as below. (I recall I saw some earlier artifacts without the external display but didn't report at the time. Sorry, unhelpful parenthesis.)

Hardware Overview:

Model Name: MacBook Pro
Model Identifier: MacBookPro18,2
Model Number: Z14X000GDLL/A
Chip: Apple M1 Max
Total Number of Cores: 10 (8 performance and 2 efficiency)
Memory: 64 GB
System Firmware Version: 8419.60.44
OS Loader Version: 8419.60.44
Serial Number (system): (obfuscated)
Hardware UUID: (obfuscated)
Provisioning UDID: (obfuscated)
Activation Lock Status: Enabled

Apple M1 Max:

Chipset Model: Apple M1 Max
Type: GPU
Bus: Built-In
Total Number of Cores: 32
Vendor: Apple (0x106b)
Metal Support: Metal 3
Displays:
Studio Display:
Display Type: Retina LCD
Resolution: 5120 x 2880 Retina
Display Serial Number: XLPH7NJQ7J
Display Firmware Version: Version 15.5 (Build 19F80)
Main Display: Yes
Mirror: Off
Online: Yes
Automatically Adjust Brightness: Yes