Fake Christmas Tree
Two colors of rope lights
Extension cords (ideally the colour of your wall)
Hooks for rope lights
Stronger hook for tree
Zip ties or scotch tape
Green electrical tape
VERY LIGHT Tree decorations
Step 1: Choose Your Location
One thing to consider, however, is that you still need plug in the lights on the ceiling, so I would suggest placing it near a wall or in such a way that you can easily hide the cord. If you can get your hands on some lights that are battery-powered, that would solve a lot of problems too. The bottom has a little more freedom, but keep it near enough to a wall that you can use fishing line to secure it upright.
Step 2: Tie The Branches
We also had problems with some branches sliding out of their slots when the tree was inverted. Some green electrical tape helped keep them in place.
Step 3: Measure Portals
Although Ryan Kelly mentioned that he used black poster board for the backing of his portals, my project partner Oksana suggested using tinfoil instead. When lit up, the tinfoil helps reflect the coloured light of the portal, as well as the green of the tree, which helps it look more like an open, glowing portal.
The middle of the foil for the bottom part of the tree can be removed to help prevent the tree from sliding on the floor.
Step 4: Install Hooks and Ceiling Portal
The tinfoil can be placed such that it is sitting on top of the rope lights, and then secured in place by installing the hook for the tree in the centre of the portal. This should be a stronger hook (ideally one with a clasp) or ring, as it must be capable of supporting the entire top of the tree plus decorations. Use a plastic anchor for extra strength here as well if you can't find a stud.