Do you mean the dream you’re adding to TFA: Starlight?
Another vision template we sort of got from TROS was the quick flashes Rey and Kylo shared when he touched Vader’s helmet. I’m thinking if I, or others, were to give Kylo another dark side vision when he prays to Vader’s helmet in TFA, it could follow that ‘quick flash’ format.
I think it would be appropriate if Rey’s vision of Sith Rey has the slow frame rate like the Dagobah cave.
I do think Force-related stuff should play fast and loose with “how it works”, but it would be interesting if Force visions followed a certain format throughout the saga.