Rating:

# glass-windows (359 solves, 311 points)

## Description
I found a cool glass texture.

[glass-windows.png](glass-windows.png)

## Solution
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.jpg)

## Flag
flag{this_is_why_i_use_premultiplied_alpha}

Original writeup (https://github.com/BASHing-thru-challenges/HSCTF-2021-Writeups/tree/main/misc/glass-windows).