Now when it comes to viewing chakra, youre able to see chakra past matter, but the sharingans abilities dont allow you to enhance your field of vision like the byakugan like increasing range of sight.The Sharingan only allows you to recognize that your under a genjutsu by seeing your own chakra irregularity. Meaning even though you have the sharingan active you can still be affected by an illusion. However it doesn't break through ALL genjutsu techniques automatically. Only visual ones, visual means that genjutsu that affects your sight making you see illusions and what not, however it's not the only genjutsu, there are genjutsus which makes you hear illusions..etc that's what the Sharingan is able to break through "only the visual genjutsu" others can't be broken through by the Sharingan even if they were C-B-ranks according to the tomoes you have, however most genjutsus are actually visual genjutsu but you have to be aware of what type of genjutsu is used onto you. For the 3 Tomoe, we'll have to go through 3 training sessions, , but as theres a session that says you have to find me in different locations im gonna ignore it, because its pretty much what you did in the second tomoe first session, now we'll move to the second session directly, learning how to break through up to B-rank genjutsu techniques, so lets proceed.
I cast a genjutsu onto you making you see a giant fireball descending onto you from above.
(Genjutsu: Jigoku Gouka) - Illusion Technique: Hell Fire
Rank: C
Type: Supplementary
Range: Short-Mid
Chakra Cost: 15
Damage Points:N/A
Description: The user casts an illusion where the opponent sees a huge ball of fire descending from the sky and enveloping its target.
Exactly like how you broke out of D-rank genjutsu and below in the second tomoe training, this only needs more chakra, and of course the aspect that connects it all, knowing how you are inside a genjutsu with your Sharingan.