Music Mix as Part of the Concept
Not only your musical concept and style is part of making a score homogenous but also the mix. If you record a live ensemble for your score, you will most likely have a quite homogenous mix throughout the score as the room/mics etc. don’t change but if you produce a sampled score, make sure to not divert too heavily from the mix esthetics between the tracks. One cue sounding like a symphonic recording from John Williams and the next one sounding like a heavily produced track from Hans Zimmer will feel quite strange in the context of a project that should not only have a homogenous music structure but a homogenous sound.