First of all I've never had a breakthrough experience but this was the closest I've come.

Sitting at a friends house on a couch in a bright sunlit room, music playing. Smoked some 2:1 changa from a bubbler, the dose was approximately 30mg, took it all in two hits. The first of which was held in until effect were felt. After the second I was unable to speak correctly, the "doll-house effect" was apparent, things started to shift and move quite rapidly and surroundings became unfamiliar. Audio hallucinations were noticeable. Eyes remained open for the duration of the trip, which lasted ~5min.

How close is the intensity of the above trip to breaking through?
When breakthrough is reached are ones eyes open or closed or does it matter?

I understand what youre asking and why, but believe me when I tell you it doesnt matter.
You WILL KNOW when you breakthrough.
For me, my eyes are usually closed, but opening them isnt something I even think about, because I forget they are even closed. In a sense, opening and closing my eyes becomes inverted. when they are closed, I see things like they are open.
not breaking through is a profound experience itself.
Happy Travels friend, and remember, when you breakthrough, there wont be any questions about it, you wont feel the need to ask, you will feel the need to tell...and thats the tough part,lol.
Youre on your way, so be well=)

Eyes open or closed when you breakthrough it will not matter and you will without a doubt know when it happens. You won't even question "was that a breakthrough?" if you ask that question then it wasn't. It takes many tries at first to get it right. You need to inhale and hold epic amounts of vapor. It took me several times and my fiance 4-5 times before it happened.

Check out this video from Blueberry the movie on their Ayahuasca journey. Watch as he moves around and stuff is overlapped on what he see's. Then watch as they go into a trance catatonic state breakthrough and get ripped out of there bodies. That is the closet visual thing I have seen to compare at whats it like. Of course real life is much more intense. When I experience it and when I see others breakthrough they almost look dead except I see heavy breathing then move to soft breathing as they break the threshold.

http://www.youtube.com/watch?v=gagR2_Yi8wE

Ive walked around in a full on breakthru. I even managed to negotiate stairs and go the the toilet. Entities helped me back up the stairs and they watched me from behind the bathroom wall while i took a psychedelic leak. Everything was vibrating and had a blue tinge to it. It lasted about 40minutes, just plain vaped spice no harmalas. My mindset was kinda shocked, it's hard to explain but i felt like the truth was revealed to me. I can't put it into words but i was in total acceptance of this even though it was pretty psychologically tough.

I prefer the closed eye breakthrus though. Think different dimension with bells on and you're halfway there

You sound nearlly there but not quite.

Thanks guys, I'll be working my way up to a full breakthrough and I'll be sure to post a trip report after the experience. Oh and I did realize I did not have a breakthrough was just curious as to how close I was with amount/trip intensity that I described.

You have to smoalk like Mad and One more Hit and you
will be there.

I was actually unable to take another hit, the 2nd was difficult enough as it was. Is it just the longer you hold it in the better or after a certain amount of time you aren't getting anything else out of it. Usually after I take the first hit and hold it in the effects are in full swing as I exhale. (about 30 secs)

True one more hit might of taken you there, but also another factor that may of contributed to not breaking through, is, you were in daylight, with music and on a couch. Now i don't know if these factors permit you from breaking through i always thought the entities didn't like noise as much. They have there own music they want to share with you.

Next time try it in a comfy bed, as much sensory deprivation as possible, this means silence and darkness, but this is just the best method for me and probably many others, do not worry you will find your sweet spot, and they will invite you when it is your time.

Safe travels friend and always use responsibly.