@805557409: Umodel supports multiple keys input, in the format one key per line in the corresponding window - order doesn't matter, valid keys will be mapped to packages automatically. For cli mode you can provide them via "-aes=@keys.txt" paramater.
As for the game, you need to use specific build from
this topic for animations to work. Some materials are custom. Apparently it's a reworked version of
Undecember.
Update: I've added option to manually change opacity for cases when respective property is not applied properly, which results in completely transparent materials on preview. This option is available in general builds now, it can be changed with Ctrl+P or via respective menu option.
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