Hey!
This is my small diorama. The main subject is ZiL-131 from the Ukrainian firm ICM. I made a vehicle about 1 week and diorama 1-2 days. I made snow so: Baking soda + white acryle + water + glue. And photos:

I admire you trying such difficult subject as a snow! Especially in braille scale! But... there are several "buts":
1. I wouldn't call it "a diorama" for one reason - there is nothing going on. Diorama usually has some narrative in it, some kind of a story, or a plot. Here is just a model with a little "stand".
2. It doesn't look like a snow much to me. More like some white "dirt" was dumped and smeared all over it. Try to look around and take pictures of snowy vehicles for your own reference. Try to notice where the snow usually get stuck. And what it looks like.
Maybe the model looks fine in a real life, but while being enlarged on the photo, it allows all the problems to be visible.

Again, everything I wrote above is my own opinion. IMHO - as long as you like what you do and see ways to improve - that is what counts.
If anyone knows about this topic more than I do, I hope I will be corrected.

Thanks, Minsk!
1. Ok. I will be call it stand now
2. I made snow first time, so I knew about my mistakes.
About last sentense, I think you are right, thanks for criticism.

It looks like the truck is in Wisconsin. IT looks good for a first time "snow job" Keep up the good work, Keep modeling

Thanks, Tankking.
Can you put your works?