3DTV interview with Tim Dashwood

Originally published on 3DTV.com June 20, 2011
by Marshal Rosenthal

3DTV
Let’s begin with what the challenges of shooting 3D are for the videographer?

Tim Dashwood
The list of challenges for shooting stereoscopic 3D is very long.  Traditionally every cinematographer has always attempted to create depth in a scene through lighting, camera placement, camera movement, occlusion and lens selection.   Some of those same techniques that work very well in 2D can actually hinder the creative process when shooting stereoscopic 3D.  It almost requires ignoring your instincts and a necessity to retrain yourself on how to be creative within the limitations of S3D. Once you have been doing it for a long time you begin to think in 3D and get quicker and quicker at choosing the correct convergence and interaxial separation.  You owe it to your whole audience not to cause eyestrain.

3DTV
How do you compare the “physical scene” to the “projected scene” as regards 3D?

TD
[In] reference to the physical scene versus the projected scene, it is easy to memorize a set of rules and a list of scenarios to avoid, but to truly become a skillful stereographer, you need to be able to fit your depth bracket (the depth of the scene) into the parallax budget for your target screen size.
Of course it isn’t as simple as just following an algebraic equation because there needs to be a consistency between shots and a depth script should be respected throughout the project. The challenge is to balance the director’s desire to utilize depth cues whenever possible and the goal of not taking your audience on a roller coaster ride for the whole film.

3DTV
Let’s talk about your software program, Stereo3D CAT. What’s the problem that it’s designed to solve, and how does it go about doing it?

TD
Stereo3D CAT is a collection of new software tools that can be added to the stereographer’s arsenal to help him save time on set and communicate with the other creative departments on the project.
When combined with the Dashwood 3D chart from DSC Labs, it can help calibrate the stereoscopic camera rig alignment much faster than [was] humanly possible before.  It reads special markers on the chart and provides the rig tech with exact measurements (wirelessly via iPad) that aid in the alignment on all 3 axes for each camera.  It also helps match color and gamma between the cameras and can flag issues with shutter sync.  But camera alignment is just one small aspect of Stereo3D CAT.

Continue the interview at 3DTV.com

1 Comment for 3DTV interview with Tim Dashwood

  1. Carol says:

    We are very happy to have participated by mainkg the equipment available to Arnaud. He really is the pioneering force behind RED in France.However we respectfully take exception to the term hefty when describing our rigs. Perhaps the term is fair when compared to some of the hobbyist rigs currently available but I can tell you many stories of 3D from 10 years ago when the fully dressed rigs weighed in at nearly 300lbs. Even today some of the new rigs easily exceed 250lbs with a pair of F23s. The Quasar with F23s and the rest of the necessary parts scan still weigh less than 100lbs. Now since hefty was followed by incredibly solid and rigid we really don’t have much to complain about. Anyway, we’re happy to be involved and look forward to what LocaRED will do with the entire line of Technica 3D rigs. Any chance we can see some photos of the rig in action?Stephen PizzoElement Technica