Thank you guys! Besides upscaling I'm trying to fix whatever issues I find. This is a list of what I've got so far:
Manticore Statue wings are no longer transparent. (Because it's a statue.)
Fixed Fenris Wolf mouth. (Issue with texture wrapping around.)
Fixed Mountain giant shirt. (Issue with texture wrapping around.)
Fixed Villager Egyptian Female hair. (Issue with texture wrapping around.)
Fixed Longboat shields. (The shields had a box around them.)
Fixed Dragon Ship front. (The sides below the front of the ship were not rendered.)
Fixed Greek Titan Gate grass. (The grass around the titan gate was square.)
There may be more I forgot about. Also after preparing this showcase I've decided I'm not satisfied with some upscales and I'm going to reshoot them in-game. Where it's possible, for example corpses or icons.
I'll update you after I make more progress!
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