Using nightmare material to induce transformation along with lucidity.

[Cobalt Storm]

An example would be the following: Artificially associating webs(persistent or abundant appearance of webs already function as a dream sign) with a physical transformation(TF). My thinking is that if I can "assign" a TF or several possible TF's to a dream element, then I might be able to automatically induce a TF after a predetermined action is done(like touching the webs), even in non-lucids. In theory, this can work with anything; I chose nightmare material because it's much more likely to show up. Another question. If a dream element has been nightmare material in the past, but It's not anymore, is there a way to make it scary again? When I was really young, I was scared of the voice trumpets from teletubbies. Way before I knew about LDing, they became the occasional nightmare and dream sign, gradually lessening in frequency as I got older. I wonder if it's possible to make them scary again in dreams? ^I'm trying to turn certain things into something harder to get my mind off of, resulting in more successful affirmations.