Stretchy anti-bird netting is good, it follows the form really nicely and you can roll-up and pin excess at the base.
You can read a bit more in our mini-guide.
You can read a bit more in our mini-guide.
You could just throw some sheets over the dome to create a very simple den.
Cardboard or material in different colours can be cut up into triangles and applied to the dome. In both cases you can paint or draw on the triangles to create different effects (moonbase?).
Or you can sew together a more finished cover using a pattern.
Ply or OSB cut into triangles and screwed onto the frame will create an incredibly strong dome. Potentially combined with polycarbonate panels to create windows.
Camouflage netting works really well in more natural contexts and is easy to apply as it is stretchy, so it follows the form of the dome well. That combined with a more weather-resistant cover and some foliage from the surrounding area can make for a really nice hide.