It's simple but a clean chop and very convincing but just a small nitpick, in high res, the snowboarders edges just need a little bit more attention, maybe feather 1 pixel when cutting with polugonal lasso tool Still well done

I think the shadoe is very unnatural, and the repetition in snow patches is obvious, even in low resolution, i suggest working on those.I would also suggest adding a bit of motion blur to the snow

agreed, put some motion blur on the snowflakes. also, experiment with different flake sizes, to help create depth

Thank guys hope this is better

Try to find a tutorial on the internet for how to create snow in photoshop, it will definitely help you to improve this. I also suggest you sharpen the background, because the snowboarder has now been blurred completely. As for the shadow, it still looks unnatural, i suggest you remove it and try again, just a bit of low opacity black paint around the edges of the snowboard and not the whole person. Good luck.

Ok here is a remake. Thanks all

It's totally different now...