Someone found out HDR emojis and stickers work on Slack: https://sharpletters.net/2025/04/16/hdr-emoji/
So I've decided to experiment a bit and see if it works on Discord.
It works! But only if you find a way to pass-through the image as-is through the CDN.
One of ways to do this is making it an APNG sticker.
magick emote1.png -duplicate 2 \
-define quantum:format=floating-point \
-colorspace RGB -auto-gamma \
-sigmoidal-contrast 5x10% -depth 16 \
-profile 2020_profile.icc -quality 100 alula.apng
https://storage.alula.me/hdr-emote-meme/emote1.png
https://storage.alula.me/hdr-emote-meme/alula.png
wow this is awesomes