The great controversialist Gaspar Noé appears to be a very nice, softly spoken man who keeps making films that polarise audiences. Seul contre tous and Irréversible are notorious enough that I already have a very distinct idea of what Noé’s movies are like without having seen them. This is an embarrassing admission. An attempt to see Irréversible was abandoned through lack of backbone, leading me to see Confessions of a Dangerous Mind instead. Nice enough movie. Nothing particularly memorable about it, other than Hott Sam Rockwell’s performance. Still, it irks me that I didn’t see Noé’s movie, that I thought it would be too much for my sensitive constitution.

Before the first London Film Festival screening of his latest movie — Enter The Void — Noé chatted to us via a typically British mic (i.e. unreliable and sporadically malfunctioning), briefly describing his battle to get the movie made, before doing something a filmmaker will rarely do: he gave us the key to understanding the movie. “Watch the expression of the woman in the final shot. The very final shot. Keep looking at her. It changes everything. It’s very important.” I assume with great confidence that everyone in the audience did keep their eye on that final face, but it did not answer anything. It’s possible to watch that scene and have wildly divergent ideas of what just happened, as evidenced by the muted chatter of my fellow filmgoers as they filed out of the screening.

That expression is viewed by Oscar (or rather “The Soul That Was, At One Point, Within Oscar’s Body), a drug-dealer making a paltry living in Tokyo, and portrayed by Nathaniel Brown in the very few shots we see of him. His only goal in life is to protect his sister — Linda, played by a seemingly drowsy Paz de la Huerta — after they are both orphaned in a car crash, but in doing so he seems to have effectively damned them both. While making what seems to be a simple drug transaction, Oscar is killed by the police, and then leaves his body to go on a journey through the afterlife that tallies with a description of The Tibetan Book of the Dead given early in the film by Oscar’s best friend Alex (Cyril Roy). However, is this death, or a DMT hallucination? And if it is death, where does the journey begin and end? There’s enough ambiguity here to fuel discussions for years.

My own interpretation (which I won’t include here, in order to keep this as spoiler-free as possible) seems to differ from others I’ve heard. All that can be said with certainty is that if you’re willing to give yourself over to it, Enter The Void is a revelatory experience, and the most immersive expression of a person’s viewpoint ever made. Noé’s dedication to presenting lead character Oscar’s point of view is already impressive enough — even down to adding blinking and breathing in early scenes — without then killing him and showing his afterlife experience from the same perspective, albeit now with the laws of physics being no obstacle. The camera floats over the characters, flies through the air above Tokyo, flows through walls, dips into people’s head’s to experience their perspective, and bursts back and forth through time. It’s disorienting, terrifying, liberating.

Comparisons have been made to Kubrick’s 2001 — there is even a direct reference to the Stargate sequence in one throwaway shot — but Noé’s visuals also invite comparison to Ken Russell’s Altered States, and especially Doug Trumbull’s Brainstorm. Trumbull’s attempts to create a hallucinogenic post-death sequence to end all such sequences was scuppered by budgetary troubles and technological restrictions. Enter The Void manages to do what Trumbull dreamed of, to the point that one visual conceit employed by Noé — having the camera move from one light to another to convey a passage of time from one nightmare vision of the future to another — is very similar to the way the camera reviews moments from Louise Fletcher’s life in Brainstorm, passing through a lattice of lights, each containing a single memory.

Before the movie began, Noé described his experiences with hallucinogenic drugs, which he believed had never been replicated properly onscreen, and had been trying to make Enter The Void for years. Until now no one had the technology to accurately depict the experience, but also no one had the single-mindedness to film something as ambitious as this. His formal daring — unmatched by anything else I’ve seen in a while — sadly overwhelms his story, which is as dreary as his presentation is beautiful. The humdrum couplings and binges, indifferently acted, are written with depressing inarticulacy. As the audience’s eyes and ears are hypnotised by everything else, the heart is left unmoved for large stretches, particularly during the long nightmare sequence. It doesn’t help that this is one of the worst performed movies I’ve seen since 300. Perhaps that’s the regrettable downside of filming in such a way that for much of the movie you can only see the tops or the backs of the actors’ heads.

These flaws could have wrecked the movie, but it is saved by the relentless visual flow, beautifully rendered by Buf, and the hypnotic sound design by Daft Punk’s Thomas Bangalter. If you let it, this throbbing ebb and flow of sound and vision will carry you through any longueurs, dazzling you with astonishing model work that makes Tokyo look like a tilt-shifted playground that gives off its own ambient thrum. All of these atmospherics pay off with a bravura final act that fully engages all senses and emotions. Tipping over completely into pure visual fantasy, Oscar completes his journey through death, and Noé – with endearing sentimentality, not to mention the use of an image that drew amused gasps from the very British audience — brings us to a conclusion at once expected and surprising. Perhaps understanding that the experience of watching the movie is liable to leave his audience in a state of mental disarray, Noé cares enough to bring you out of his dreamstate with a final image and two title cards that act as a slap in the face. Very thoughtful of him.

It’s doubtful that Gaspar Noé would appreciate the comparison, but last year’s Speed Racer was another formal experiment in replicating a particular experience — the Wachowskis with the visual conventions of Japanese anime, Noé with his subjective hallucinatory experiences — which managed to transcend its mundane plot by sheer effort. The Wachowskis and Noé found their movies treated with indifference or hostility by the critical community, and had difficulty finding audiences for their projects: literally in the case of Enter The Void, which has no US distributor at the moment.

The subject matter of this movie is liable to alienate many people for very different reasons than those that made Speed Racer the pariah of 2008′s summer season. While that was a candy-coloured action movie containing a sweetness and innocence that failed to connect with critics. Enter The Void is excessively unpleasant for much of its running time, featuring violent death, graphic sex, and a scene in an abortion clinic destined to achieve notoriety. This kind of unflinching visceral imagery is relentless enough to fuel criticism that Noé is nothing more than a provacateur. To do so would be to ignore the very specific plot structure that is set up early in the movie, as Alex explains to Oscar the distinct stages of the post-death experience as detailed in the Tibetan Book of the Dead. If you’re going to endure a vile nightmare after death, Noé is going to make you experience it. And then some. This point seems to have flown over some critics’ heads, as well as the very obvious fact that the PoV never shifts from Oscar. We experience what his consciousness experiences in one unbroken 155 minute blast, not a melange of images, as some seem to think.

Whenever something as purely sensory as this comes along, it’s easy to complain that the flash hides an empty core, but even if it did — which I don’t believe it does — why should we dismiss something that succeeds so completely at generating a mood, or a mental state, or a new form of telling a story, just because it offends our sensibilities, or celebrates sub-cultures that are considered beneath contempt? The mundanity of the subject matter is easily forgiven when a filmmaker goes to such extreme lengths to bombard your senses, or has such loyalty to his vision that he will change the language of cinema to do it. This is a movie to feel and experience, much as Lars Von Trier’s Anti-Christ achieves such complete mastery of mood that any reservations are swept away. Save the pondering for later, once you’ve reached the end of Noé’s trip. Last year my exhortations to see Speed Racer on the biggest screen possible — preferably IMAX — fell on deaf ears, but — if this gets an international release — the imagery of Enter The Void demands to be seen in a cinema with the best projection and sound system possible. Sit in the middle of the cinema. No popcorn. Take a bottle of water and a catheter. Drop a tab (actually, don’t drop a tab. It will probably negate the hallucinatory properties of the movie and make you think you’re watching something mundane, like a Mike Leigh movie). Keep your eyes open like Alex in A Clockwork Orange. Prepare for awe.