The image uses a gradient and many distorts on top of each other to create that effect. Tbh I actually learned about it from spending an hour in Photopea and messing around with the distorts
Sadly, this GFX was NOT the best and has various complications. But please understand this platform if for 13+ people. We are not being “mean” or anything, we are sharing our feedback. Once you submit a post you are understanding that people can provide critical feedback.
Also, please note ROBLOX will not just “delete” messages and this post also floods chat so please PM the user in a way were you don’t just say “mean” but explain.