Experimenting with Glowing Effect?

So, i really love fantasy theme.Usually when i play fantasy game, i always love to see the background. How on Earth did the artists made beautiful but not-overshadowing-the-characters backgrounds? In the end, i knew i can't draw a complete background so i decided to draw just a part of the backgrounds which are the plants. They are not real plant so i don't know if i was doing them the right way but i still love them😋😋😋