I've only ever read sci-fi (which makes me somewhat parochial in my world view) but up until two years ago I'd only ever written romance (erotica actually but that seems to be what 'romance' is these days)
I found the combination remarkably easy, probably by being aware of the various conventions of the two 'genre' but from opposing directions (reading one and writing the other)
I must say however that I don't like reading erotica in my sci-fi, I absolutely abhor the romance in sci-fi films because it is almost always tacked on (exceptions survive obviously like Bladerunner) but did we really need to see Anakin and queen Amigdala rolling around in the grass?
I found the combination remarkably easy, probably by being aware of the various conventions of the two 'genre' but from opposing directions (reading one and writing the other)
I must say however that I don't like reading erotica in my sci-fi, I absolutely abhor the romance in sci-fi films because it is almost always tacked on (exceptions survive obviously like Bladerunner) but did we really need to see Anakin and queen Amigdala rolling around in the grass?