Irrlicht.Net is no longer developed or supported, Irrlicht.Net Cross Platform is a much more complete wrapper. Please ask your C# related questions on their forums first.
Is there a wrapper for the SKeyMap in Irrlicht.NET? I searched for 'SKeyMap' in the documentation and found nothing, but perhaps it is wrapped under another name or a similar functionality can be implemented in another manner?
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Should I just write my own code within the main game loop to retrieve user input and translate camera matrices?