I'm going to animate Queen Mishah walking for my next animation project, and we had to design the backgrounds. So that gave me the opportunity to work with Twilight Lagoon and flesh it out.
This is the first bit. I finally drew out the Healing House Tree, where Harith takes care of Phineas. The vine with the spiral are the stairs that they take to climb it, and the little thing at the end of the branch is where Ferb stood when Mishah came and spoke to him for a little while in private about being the other "Seer". I plan on designing the Healing House too. There are supposed to be more limbs that support the house, but I didn't draw those. Only one.
The trees up in the corner are what the Nymphs' homes look like at night. At least the ones in the trees. The blue flower was practice for what covers the ground in the forest that surrounds Twilight Lagoon. The red one is the Silk Cotton Tree blossom. Several trees surrounding Mishah's palace are silk cotton trees, so these flowers bloom around her home.
More coming eventually.