It would take too long to write in detail all the things I learned at this year’s DGA Digital Day, so here are some of the notes I took.
VIRTUAL SETS
On the topic of Virtual Sets, we saw some amazing “virtual backlots” composed of either stitched HD footage or tiled photographs. Virtual backlots are background elements for compositing. These can be locations like Time Square, the Library of Congress, or the Redwood Forest. Image stitching or photo stitching is the process of combining multiple images to produce a panorama or larger image. Some of the footage was nearly impossible to tell that it was a green screen shot. The still photography stuff was of particular interest to me since they were using HRDI.
HRDI is High Dynamic Range Imaging (HDR or HRDI photography) which is a set of techniques that allow a far greater dynamic range of exposures (i.e. a large range of values between light and dark areas) than normal digital imaging techniques. The way it works is you take multiple exposures of the same image and combine them in post by keeping the best exposed portions of the frame and discarding the portions that are over or under exposed.
Stargate Digital made the comment that Arri D20 strongest channel is blue and therefore considers it a good choice when shooting bluescreen. I just read in “Below the Line” magazine that they have been a long time development partner with Arri by testing and developing software for the Arricam, 535 and 435 as well as being among the first to get an “Arrilaser this side of the Atlantic.” In fact this season they’re replacing all their film cameras with Arri D20s.
Vendors: Stargate Digital
STEREOSCOPIC CINEMATOGRAPHY
A note to cinematographers when finishing a stereoscopic film is to print brighter to compensate for the loss of light with the polarizers. By how much, I’m sure is a subject for testing but a good note nevertheless.
IRIDAS has a color correction pipeline for finishing your stereoscopic project. I’m gonna pay them a visit in a couple of weeks to see the product first hand.
A couple of terms came up worth mentioning. Theater space is the area on which an image appears to be on in front of the theater screen or over the audience. Screen space is the plane on which an image appears to be on the same plane as the theater screen. Depth Script Budget is a graphical timeline that measures the eye fatigue the audience is experiencing.
Bouncing depth from shot to shot can cause eye fatigue.
Given what I saw this weekend and with the support for stereoscopic productions by Cameron, Spielberg, Rodriguez, and Zemeckis, I believe we’re looking at the future of cinema. The footage I saw was amazing and the potential to expand the artistry of cinema seems to be with in reach finally. I’ll be writing much more on this topic in the coming months.
Vendors: Real D | 3ality | Imageworks
CUTTING EDGE APPS
Two companies showed what can be done with digital life casting. Life casting is a make-up term where a copy of the face, appendage or full body is made. Here the copy is a digital data set. Three methods were shown. One with the often seen face marks (marker based tracking) which use dots placed on the face and head and then tracked using infrared cameras that generate data marks. This is useful for skeletal motion but limited when capturing the nuances of facial motion.
Mova is using a phosphorescent makeup built into the actor’s make-up. The actor stands before multiple cameras that record either visible spectrum or grayscale . The visible spectrum footage make up the “skin” for the depth mask created from the infrared spectrum footage. This system is able to capture subtle detail in deformable surfaces like tendons, wrinkles, and cloth down to a tenth of an inch. Image Metrics is doing something similar but do so with the use of only a video image - no special make-up or use of multiple cameras.
While the uses are generally obvious like swapping the face of a stunt actor with that of the lead actor. But one suggestion that was made was to manipulate the actor’s face to match the facial expressions of a native speaker of another language. It’s a way of capturing the nuances of a foreign language speaker.
Vendors: Mova | Image Metrics
DI FOR LOW TO HIGH BUDGET PRODUCTIONS
The necessity of the DIT (Digital Image Technician) might be on the decline. As explained by the panelists, the notion of a DIT is a TV idea that was translated to the film world. As more cameras shoot in Log and more cameras are designed with software that is tailor made for film cinematographers by reducing the number of options, the need for a DIT could be diminishing. Still other panelists argued that as the need to maintain monitors, cabling, and IT data management of raw data grows in demand the role of the DIT is secure. The concern most directors seem to have with the DIT is that of getting between the DP and the director with concerns to the image. Also, several have had problems when the director and DP are ready to shoot but then have to wait while the DIT is, as one panelist put it, “putting their final touches on the image”. There is also a concern with the need to have a “temple of technology” on set to accommodate the engineering tent.
With concerns to Log image capture, it’s becoming more common to not “bake” the look of the film on set through image manipulation instead waiting until post under ideal conditions to finalize the look. That’s not to say that current technology is a “fix it in post” mentality. Put simply, between the camera and the viewing monitors are LUT (look up table) boxes that are predefined during preproduction testing to show you on set what the image will look like given your post work flow. As on panelist described, you get to smell what the image will look like but not taste.
My favorite sayings from the event…
Talk is cheap, fix it in post is expensive! - Leon Silverman (LaserPacific)
Don’t pick the camera to save money, pick it because it’s right for your story. - Leon Silverman (LaserPacific)
There is no ideal solution for all, but always an ideal solution for each project.
Studying for the test - Leon Silverman (LaserPacific)
Or, as I like to say… “do your homework!”
Vendors: Local Hero Post | LaserPacific | EFilm