Snowed Grass side and Layered snow have different brightness both in Day/Night, Night but near powerful light source. here I attach a few more screenshots, taken in Bedrock edition:
[media]Day time
[media]Night time
[media]Night time near light source.
Clearly is a Bug as: It looks totally off, especially in game play near snowy Mountains, seeing different brightness destroys connectivity of textures, which is obviously a Bad thing.
Here I attach an screenshot of How It's supposed to Look:
image taken in Java edition, Layered snow & Snow block perfectly connect to Snow grass side without disturbance, unlike bedrock edition.
I also believe this bug didn't exist some version before 1.17
Thank you for your report!
We're tracking this issue in MCPE-57022, 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