You can not see intramuscular fat, how can you possibly judge a physiques intramuscular fat 
I explained this to you a few times now haven't I ? externally , you can compare Dorian Yates to Paul Dillet and see who is carrying more intramuscular fat especially from the back , you can see who is soft ( carrying more intramuscular fat ) and who is dense ( carrying less intramuscular fat ) you can see the depth , detail , separation and striations , all with your own eyes.
Ronnie 2000 is soft ( carrying more intramuscular fat ) compared to how he looked in 2001 ( while carrying bare bones intramuscular fat ) dense , get it? simple concept.