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Most of us either have access to a desk-fan or could get one for a cheap enough price, it might add some depth to open cockpit flight simulators (or might just be gimmicky). I wonder how hard it would be to rig up a desk fan so that the rpm of the rotor is linked to in-game airspeed?
What other household items could add to the immersion of the Rift? Heater for desert games? Max out the air-con to play in the arctic? Or even just sit outside in winter to play Metro 2033?