So basically, when I use freecam, it just renders this messy point of view. I don't know what could have started it, but I will leave here all the mods I was playing with when this happens

Mods:
https://cdn.discordapp.com/attachments/337526018455764992/698975843468443719/unknown.png

It's most likely a conflict with Optifine, as usual. I rewrote the Free Camera feature to some extent in the 1.12 version back in December, maybe that newer version will fix this issue too when it lands on the 1.15.2 code base at some point.