Synchronize perception with what is being perceived. For example, put on a song, and instead of listening to it, become it. Same goes for the rest of the senses. Merge it all into one single sense, then dissolve that too.
Psychedelics can help. But best done sober.
Drop the notion of god and realization, its in the way when it come to this. This is all done once the thinker is completely gone and thought is no longer arising.
Be warned.
This is dangerous business. Super advanced. Do not go down into before it's time.
Dissolving perception is not something you do, perse. It's something that happens when identification with sensory input is seen through.
I don't think sharing too much in depth information about it here is safe, as of now.
Physics, math, sacred geometry... all helpful.