Are movies altered to be on Blu-ray?

[Erman_94]

i just had a general question on how blu rays are made.

isn't blu ray supposed to be generally what the movie ACTUALLY looked like in real life? hence the "high definition"...

if so, how can we "rate" video quality on blu rays if it is what it looks like to begin with?

isnt it like saying an orange shouldn't be an orange, it should be an apple? (or it looks like this, but it should look like this?)

and in many reviews i hear about skin tones that are off etc. etc.
...does this mean that the people producing these blu rays alter the picture and source material to make it look like what they want? and not what it actually is? shouldn't these skin tones (or anything else for that matter) just be what appeared on the source material through the camera used?


i may be way off, but i would certainly appreciate some input

thanks.