Rating:
I found a cool glass texture.
As in pallets, we can begin with the initial checks like file, strings, exiftool, binwalk etc. There's nothing out of the ordinary, so I decided to move onto stegsolve (by Caesum). We can test each analyze feature; stereogram solver is the first one that shows something different. When changing the offset from 0 to 1, the flag shows up as shown below.
flag{this_is_why_i_use_premultiplied_alpha}
