Nice job! These pics look good and are enough dark to be useful as backgrounds. The next level in your development is to create such pics matched with the resolution of the screen.
Here's an example:
Not all lunchers can handle well such non-scrollable pics as backgrounds, so the next step is to create a scrollable background pic, which has higher horizontal resolution.
Right your replay... but simply use a launcher that can automatically adjust an image as a background.
anyway, I am generous, because I recently sold almost all my Umi phones and I'm using other brands; but I will always be an Umi fan
An adjusted background is nice if a blurry or pixelized picture doesn't hurt your eyes.
I guess you just love and can't forget us, so you're still here.