Not my era, but your terrain is beautiful. Care to share the secret of your "battle mat"?Frankhttp://adventuresinlead.blogspot.com/
Hi,I made it out of canvas, old fashioned tent material. I them painted it with a thick rubberised DIY item that was designed for sealing leaking water pipes. This product was rubberised which was the attraction as it allowed it to be reasonably flexiable. Onto this wet goo I tipped sand of various grades and allowed this to dry.I then painted it a suitable colour.Best done in the garden on a sunny day.