First of all, sorry for derailing the thread. Just clarifying a few things here.
QUOTE (toturi @ Dec 21 2012, 02:49 AM)

Check the description of Tempo. IIRC, Tempo confers a Magic Rating. So when you take Tempo, you are no longer mundane.
You are looking for a drug that either gives you astral perception (hence dual natured) or astrally project without confering any Magic rating.
Does the Astral Gateway power cause mundanes to astrally project?
The astral passage in Hong Kong sadly lacks a rules section.
I just read the relevant sections from Ghost Cartells again and it doesn't mention if tempo grants a Magic attribute - it grants Astral Perception. If getting Astral Perception confers a Magic attribute (I'm not sure about that), this means tempo grants a magic attribute, but note that it doesn't use the term Dual Natured, which would come with an automatic Magic (1). Besides that, all that is mentioned is that long-term use
[ Spoiler ]
can cause a Dream Pact with the spirits that create the drug. Dream Pacts can also be made by mundanes, so this doesn't imply magic, either.
Rereading Arsenal's entry for shade, I found that it also doesn't mention a Magic attribute- it only says that it allows users to project longer than usual, which I interpret as completely overriding the usual rules for astral projection where duration is limited by the projecting person's Magic attribute.
Deepweed doesn't directly mention a Magic attribute, either, because it is irrelvant. The text says that it forces any magically active character to astrally perceive, even adepts without the Astral Perception power, so having a Magic attribute is a given if deepweed is supposed to do more than give people a +1 boost to willpower and make them really, really stoned.
In total, I'm left a bit puzzled now. These drugs give abilities that are normally firmly tied to possessing a Magic attribute through some means, but they don't mention if they grant a temporary Magic rating. I don't know what to make of that. I'd probably rule that they do not grant a Magic attribute and that somebody assensing a character on tempo or shade would recognize what's up if he was familiar with the auras of people under the influence of these substances, but that's just my interpretation of the sparse mentions the texts make of their effects in that regard. It's not explicitly stated anywhere.
QUOTE (Falconer @ Dec 21 2012, 04:12 AM)

So without masking they lack any element of control. Like I said they end up on an 2001 style acid trip of sight and sound and color with no real idea how to interpret anything they're experiencing. (that training comes with the assensing skill).
Apologies if i had the exact drug wrong... I just know there's one which is fun to use on unawaked characters.
No problem, I had to read up on this stuff again as well to get it right. It's been a while since I read Ghost Cartells.
Tempo aka flipside actually does give the users a meaningful interpretation of what they perceive astrally- they get a +2 to all skills from the Influence group because they subconsciously pick up emotional clues from people's auras.
Of course, they'd have to learn assensing to make normal use of astral perception, such as determining if somebody is awakened, diagnosing diseases via aura reading, telling that somebody is sustaining an illusion spell, benchmarking Essence or Magic of others etc.
On top of that, tempo
also causes visuals by pharmacological means- the text mentions "serotonin stimulators" in that context. That could mean either 5HT2a receptor agonism as with LSD or serotonin release as with MDMA (ecstasy), or both as with MDA or 6-APB, with the accompanying visuals.
General perception also seems to get heightened (+1 to Perception).
All of that must be a bit confusing, as is to be expected from being simultaneously on a powerful psychedelic/empathogen and perceiving glimpses of astral space for the first time, hence the -1 to Willpower.
It's basically like acid on acid. But also like ecstasy on ecstasy. And it seems to be a more powerful dopaminergic drug than either of these as well.
No surprise it's the wonder drug of the 2070s.