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By the way...here's an example where they actually added grain because the HD picture (shot with an Arri Alexa camera) looked too clean (Blu-ray "It's a Disaster") >>>
Oscilloscope brings It's A Disaster to Blu-ray with a 1080p/AVC-encoded transfer that has its own peculiarities but seems absolutely true to source. What's unusual here is that while the film was shot digitally using the ever-popular Arri Alexa camera, director Todd Berger thought the crisp HD picture looked too clean—he mentions this in his commentary track—and decided to put a layer of film grain on top of the image in post- production. The sometimes heavy grain you see in the picture was very much an aesthetic choice, then, and not the result of camera noise or compression. And actually, the image does look very filmic; if you didn't know it was shot digitally, you'd have a hard time telling. Does the added grain detract from the sense of clarity? Maybe a little, but only if you're pixel-peeping screenshots. From a normal viewing distance, the picture looks excellent, with visible fine detail in hair and faces and clothing, especially in closeups. The color grading starts off realistically, with neutral skin tones and white balance, and as the "disaster" of the title ramps up, the light shifts towards a green-tinged warm cast, hinting at the poisonous air outside. Saturation, black levels, and contrast are all even-handed and unobtrusive, and there are no obvious compression/encode issues.
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