Why would he go through the trouble of creating a new render? I mean, if he is doing it for his own enjoyment, than by all means...but I hope he wasn't creating a render for all of us for no real reason.
When you render the CAD files as-is, they end up looking like
this. It takes a lot more work to make it look "real". The CAD files are finished enough for CNC purposes, but there are probably still some finishing touches like the wording around the ports that still need to be done. Stuff like that isn't vital for what we need the CNC case for - structural testing.
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More On Topic, when is the final keymat prototype supposed to be done? Is there going to be a final keymat prototype? Or was that other keymat the prototype that passed and you have ordered 400-4000?
The keymat is finalized and the manufacturer is already making up the molds for mass production.