I would like to get a slight sand texture on a beach cake I am making.   somewhere I did see a cake where the tiers barely had a sand coating on it.  Almost as if they dabbed royal icing onto the fondant.  Maybe this was the technique they used.  I would appreciate suggestions or photo on how to do this.

I've seen cookies done similarly with texturing royal icing on top of dry smooth royal.  They used a paint brush and just dabbed at it.

I crushed Dad's cookies really fine in my food processor.  Put my cake on my turntable with a tea towel underneath. Placed a smidgen of crushed cookies  the palm of the hand, and gently blew onto the freshly iced cake. Turned the cake around, did it again, etc., etc. Sounds crazy, but it worked. "Sand"  randomly landed on areas of the cake. 

Thanks everyone for your suggestions.  I just,dries,dabbing Royal icing onto the fondant and it looks goo.  So that's what,I'll do.  Appreciate all your I put