A decent enough piece of Lovecraftian horror, sans blood and gore or expensive special effects, that only hints at the cosmic terror haunting its victims. The Triangle has the look and feel of a fairly low-budget affair, but is filmed in a beautiful, stark location that lends to a suspenseful atmosphere. There are many open questions of character motivation and backstory that some will find unsatisfying. However, I was fine with certain key plot elements being left open to my imagination.
Done right, the filmmakers could have elaborated and put the finishing touches on a masterwork of dread. But, given the ambition of the idea behind The Triangle, they could've more easily gone too far making silly, illogical choices, creating not a modest psychological thriller, but a full-blown farce. In the end, The Triangle is an incomplete, interesting charcoal sketch of a paranoid's half-remembered nightmare, but not a fully rendered, color masterpiece of a seer's infernal vision.