Very nice masterpj! Thanks for posting!
Is there a longer one when you go right up and meet the snowman? I ran it through optimization and had two suggestions, one you have already done by separating the snow. dot-based snow currently traces faster than circle-based snow. This can be fixed by changing the circle radius to a very small value and it will render as a dot.
Similarly, the white spline circling the christmas tree can be thinned to a very thin value and then in ILD SOS optimization it will become one line and scan faster than two lines. Finally, the horizon could be traced fastest without creases, but they don't add too much work.
Great to have you on the forum and thanks again. Hopefully this will inspire more people to try 3D out