hi dustoff well the road is made very easy.
first you paint the whole road in the same color as you painted the muddy parts.
so its completly brown.
then you take a dark shade of grey and you apply a heavy drybrush,
let it dry and take a lighter shade of grey and apply a softer drybrush but covering most of the road, then an even lighter grey and you do a very gentle drybrush on some parts of the road, after that I took an little white and made the brush almost completly dry and did the last soft drybrush covering little parts of the road and tada
this is how it turned out.
the grass well I applied it with my fingers getting rid of the clumps first offcourse I took a big painter brush thinned down my wood glue with water and painted the whole sandy area with it, then applied the grass and sealed it with matt varnish letting it dry for about 24 hours and then starting with drybrushing the grass. very easy.
good luck
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