Visuals usually weren't extreme on MDMA or MDA for me. I'm a seasoned roller that always got unadulterated product and I've only had intense visuals, let's say, three or four times out of the 100+ times that I've rolled.
In those instances where I had powerful visuals, I consumed a gram or more of MDxx, taking an approximate dosage of 500mg and then an hour later another dosage similar in amount to the initial one. I don't condone taking amounts this large though! Not everyone can handle it. I had tolerance and a lot of experience.
Some visuals that I always experienced even on light doses were- tracers, extreme glow from lights (street lights had a radiant aura that stretched about eight ft. in a circular diameter) and sometimes bursting colours on certain objects.