How do I make my camouflage look like this?

The background appears to be down with an airbrush or you can use Wilton spray colors applied in a blotchy pattern.  The white pattern was probably done with a sharp Xacto knife or a needle tool by cutting/scraping away the color.

Thank you!  Are there other spray colors besides Wilton?   I don't see a brown one when I go to buy them.

I don't know, Lizzie.  There probably are.  You could get pretty much the same effect by dry brushing powdered colors on the fondant.  It would just take longer.

To me looks wet painted, because the colors do not appear to have the blending characteristic of air brushing. The white could either be scratched in or painted with white and thin brush.