If you’re looking to add snow to objects made of Parts, typically the best looking and quickest method is to copy over the rock, raise it like .1-.3 studs above the rock, and colour it like snow.
The rock that you made has textures on the same plane and with different orientations, which makes the textures z-fight. Consider moving some up and down.
I voted on the poll a ‘Meh’, and I figured that I should also give feedback on why I gave that rating, but anyways, here I go. This is what I believe need to be improved, so maybe consider it but don’t think it is the most important message of 2019.
Snow doesn’t cover as much as it could
I notice that on the bird’s eye view of the rock, you can see plenty of places that might have snow cover on it. Not the sides, but the top left area of the 2nd image you notice that there is no snow on it. It feels that snow should cover that area. In addition, the depth of the snow on the rock looks like there was maybe a dusting, or an inch or two of snow.
The rock is too jagged (and too smooth in other areas)
Looking at the other images of the rock, I notice some parts are extremely jagged (based off the 3rd image). If it has snow cover, it usually means it has been exposed to the elements and should wear down the rock. And on the other side, it is quite smooth, especially in contrast to the 3rd image. So I recommend you balance them.
Anyways, it is a good foundation for a rock, but I believe it needs to be polished up a bit. Keep up the good work though, I most likely can’t create things in nature like trees and rocks.
Here’s the thing. I like your rock, but the snow is really messing it up. It isn’t smooth and from the picture, it looks very glitchy. I highly recommend using blender. Use blender 2.8. It’s easy to learn the controls, and you can model a rock quick and easily. For example, I modeled this rock.
It wasn’t hard at all to model, since it’s a small and simple of an asset to make, and you can easily cover the top or the sides, or whatever with snow! Only a single youtube tutorial about making a snow covered item is all you need. You can download blender 2.8 here.
If you desperately want to do this in roblox studio, maybe try coloring the rock just plain white with the Slate texture. I can’t really think of another way to make a snowy rock in roblox studio.
I voted Meh and I’d like to give you suggestions to make it looks better,
1)Move a bit the snow, the snow and the rock are z-fighting which makes it looks extremely glitchy
2) Some sides are not covered with snow when they can be easily covered with snow in real life
Example:
Meanwhile some others which aren’t really likely to get snow on are covered
Example:
Hope I could help and I’m willing to change my vote if I see some improvement