Draw a floor surface for your model to sit on, apply a material you can edit in KT to be reflective. There are plenty of tutorials on the Kerkythea website. Start there.
The classical way: http://www.youtube.com/watch?v=HHsRRLCAOm8
or with thrupaint: http://sketchucation.com/forums/viewtopic.php?f=323%26amp;t=44552#p397448