Sirens' water battle (Patreon)

The pic for my special offer postcard! ^^

https://www.patreon.com/posts/87812039

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It took me a lot of time to finish this one. 

The file size is also huge! Go all the way to 230 mb! At one point, my computer even ran out of memery, the desktop was then crash, which force me to restart the machine. Making me really want to upgrade my PC to DDR5 for its capacity.