Reddit mentions of Get Rung Fitness Mat with Interlocking Foam Tiles for Gym Flooring. Excellent for Pilates, Yoga, Aerobic Cardio Work Outs and Kids Playrooms. Perfect Exercise Mat(Gray, 24SQFT)

I cut and pasted this comment from one I made a while back. It's very condensed, but if it looks like something you'd like to try I'd be happy to give much more detailed steps. I learned completely on my own watching Youtube videos. There's a learning curve but it wasn't bad. Just expect to make mistakes.

• Found a pepakura file
  
• Bought foam mats from a hardware store (1/2" thick)
  
• Printed out the pieces of the file using the pepakura software and then transferred them to the foam
  
• Cut out
  
• Hot glue
  
• Sand down (you can sand down the foam itself or apply body filler Bondo to smooth out edges)
  
• Apply plastidip
  
• Paint
  
  For all the bells and whistles I had to get creative and find random things around my job (I work in an industrial area so I had a bit of an upper hand there) as well as use ordinary items from the hardware store e.g. the light and tubing.