Good householder,
Maybe useful to compare it like food and it’s processing. The more careful of what eating, the more restrain and useful, the lesser burden with it.
The more right view, gratitude and goodwill, the more pleasing and calm dreams, going further to even have no more dreams at all when virtue becomes pure, and especially when mindfulness is well established.
One can give it a try by doing efforts in metta-bhavana and to stay well mindful on certain kammatthan till falling asleep.
The lesser virtue, the more transgressions, the more “hungry” after sensuality, the more troubles with the “belly”.
In this regard, and to this extent, are dreams predicting, and even give some ideas of what can be expect further in such or such way of going on.
(Samana Johann)