I tried this combination several times, hallucinations lose any charm of the amazing, you start to perceive it as "So what?".
There are thoughts that you are doing bullshit, under LSD, unlike other psychedelics, you are quite calm and positive, and when mixed with cocaine, it all amuses you to the maximum and you relate to what is happening "I'm just fucked up, nothing amazing. "
In parallel, from this, just the train of thought goes deeper, seeing what is happening, you just begin to reflect on the course of your thought and its influence on the perception of the world, there in places you try to reproduce certain emotions or their semblance, and then evaluate the change of hallucination under your actions.
There is literally no influence on the hallucinations themselves, except that the effect decreases a little initially and it will be at the same level all the time.
At once it is necessary to make a reservation that in such things as psychedelics each "patient" behaves differently. In principle, the combination of LSD with stimulants is not such a rare occurrence, today in "brands" generally God knows what is mixed, which is why it is unsafe to take drugs from "left" hands - you never know what to eat.
LSD and cocaine: I wouldn't recommend such a mix. Most likely, the journey will go into overstimulation, looping on some processes and the inability to get rid of it. This can lead to nervousness, even anger and aggression.
Compared to LSD, cocaine is a very "closed" substance. Figuratively speaking, LSD opens doors, and cocaine gives you one road along which you walk, run, and you don't need any other roads. Now imagine that you opened the doors and saw the opportunity to go in any interesting direction, but cocaine pulls you on one road, from which there is no way to get off. Such a combination is nonsense.
At the same time, cocaine can lie well already completely at the exit from LSD, when the active effects have almost completely disappeared.
Just for the record: guys, don't use drugs, you won't buy good quality anywhere, they will sell you trash instead.