Has the flexible road problem for hilly terrain been solved?

The perennial problem.  Resin roads look great on the flat, but put them on a hill or other protrusion and you get instant ski-ramp syndrome.  As we're looking at Waterloo (and using Mark's hex terrain for the hills) this is an unacceptable situation.  So I've been trying different materials to create both a flexible road but also a good looking one.

Ski-ramp resin road.
I've tried tea-towels, ordinary towelling, sacking, grip-mat but each has it's own unique problems.  Tea-towel paints well but becomes stiff and inflexible.  Sacking and towelling just soak up paint and the finish is just too rough (but great for grassy areas so I might return to the towel when doing fields).

But then I was in Poundland (a great place for wargaming 'stuff') and came across an ideal material for our needs.  But first, lets look at the finish.

Which is which?
Hard to tell?  So it is - and I only did a quick job on it.

But is it bendy?  Compare it to the resin ski-ramp.

Passes the pen test!

So it looks good, paints well and is bendy!

What is it?  It's a foam sheet - usually used as in camping to rest your sleeping bag on.  Cost £1 (Poundland, you see).  Enough to make loads and loads of roads (probably 10m worth at least).



Next - what I made out of this!