With this setting i feel its too sandy look more like a beach than a desert, need a bit ore greenery in the foreground.
This looks much better, however i need some sort of 'platform' where the two chracter can stand and can be fully seen without grass in the way.
I found this patch of sand between of grass that looked good, however the spacing is too small as the characters need to be spaced a bit further apart
This is perfect, you have the sand platform so you can see the characters but also the greenery in the background. its a good balance and i think with work as a substitute for the desert