After I experience a nightmare, what should I do?

Hint 1 of 11:

When the room returns to its normal state, you should be able to find your
relatives once again.

Hint 2 of 11:

Search the house for them.

Hint 3 of 11:

I wonder what Uncle Edwin is painting?

Hint 4 of 11:

Where does he hang his finished paintings?

Hint 5 of 11:

After each dream, go downstairs and see what is going on there.

Hint 6 of 11:

See if you can look at your uncle's easel to see what he is working on now.

Hint 7 of 11:

Look at any others that are propped against the wall.

Hint 8 of 11:

Talk to him if he is there.

Hint 9 of 11:

After each nightmare, check out the ones he has hung on the wall in the
gallery.