this background and one of the stages of the 4 stages where you can choose is a snow stage and there's not much more than that
- the original background had a black level gradient but it was very hard to see so I removed it
- the black area in the background demo photo uses the back area color palette so it is possible to use a gradient in this background
- the .palmask is included in the file and is set to black being faithful to the original background
- the graphic was put on BG2 and BG3 so it is possible to use vanilla graphics on BG1 to match this background
While it's a nice attempt, this rip suffers a bit because of its inaccuracy.
Similar to your Time Attack Go! Go! rip, this rip is missing some important colors that make quite a difference in the shading of the trees trunks. I suggest you to use palette 3 and 5, if you're going to rip backgrounds that are heavy in colors.
Do note that I'm not rejecting due to the lack of the fake hdma thing, but because of how the trees look weird without their proper shading and color. Fix these issues before resubmiting