You can pretty much toss out distance. For a given close up cue ball-object relation, one of the perceptions will work.
Concerning combinations: Typically the way two balls lay on a table with a cue ball, one of the perceptions will almost always produce a hit. A hit guarantees nothing, but for combinations most players are happy to use the entire width of the pocket. So, many combinations can be pocketed in a slop pocket manner. Who cares? Many combinations will also need adjustments to the perception. Bottom line: CTE is not exact for combinations, but the CTE perceptions will offer a hit and many times will pocket the ball without adjustment.
Stan does not switch to conventional vision when combinations appear.
Connie Shuffett