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Bloody Day

Bloody Day - Final

Bloody Day - Final

The main target of the project is the creation of a cg helmet (with references to a real one) to put on the head of a driver. For the shot i used a Nikon D3200 with a 18-55 lens. Yes, rolling shutter. I placed some white circular trackers on the background due to the film grain. The sensor isn't too much good and it has made necessary the use of trackers. I have encountered some problems, all explained in the next section, about the camera tracking (due to low parallax shift of static points), cars and other objects on markers (rotoscoping needed), problematic tracker removal on the wall(because of visibility of some markers through a car windows) and the presence of some red markers and a spring around the neck(removed with clone). I have also committed some errors during the shot, i brought with me a checkerboard to estimate the focal length but i forgotten to make a photo and so i had to resolve the camera 2 times, I also placed some little red markers on the close wall but they were too little and untraceable after a first review, these errors have made the entire resolution a bit tricky but i hope you like the final result

Full video at 60 fps

21mbit video at 59,94 fps – h264 – 1280 x 720 Progressive

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Adopted Workflow

Placing of Markers (smaller closer and larger on the distant wall) – FAILED ON CLOSE WALL
Placing of Markers on the hood (Driver’s head)
Retention of the distance of a pair of background trackers and hood trackers for a correct scene scale
Testing of a possibile shots and choice of a fixed focal length
Different shots at 59fps, hd to reduce the rolling shutter on the sensor (less lines to scan)
Some 360 photos for HDR reconstruction, needed for a correct illumination and the reflex on the helmet
Some 360 photos for the Helmet reconstruction.
Removal of Rolling Shutter, Camera Tracking and estimation of the focal length (MISSING CHECKERBOARD REFERENCE)
Again, from the source, Removal of Lens distortion calculated from the previous step, Rolling Shutter, Camera Tracking, Object Solving, Scene scale and export
Removal of Distorsion on the helmet shots. Camera tracking, export
Modeling of the Helmet, creation of multiple uvs ids, texturing, painting
Scene HDR creation and tone mapping.
Integration of the helmet in the scene, animation, lighting and rendering (material passes, ambient occlusion, object mattes,motion blur vectors)
Compositing, trackers removal and general fixes.
Color grading.

Bloody Day - Making of and Passes

Bloody Day - Making of and Passes

 

Problems and fixes

Red markers and the spring around the neck

red_points

Trackers through car windows

window

HDR References

Object Reconstruction References

Head Reconstruction

Camera Tracking References

Backstage

 

Graffiti

Final composition

Final composition

Breakdown

Breakdown

Camera Tracking done on handheld D3200. Source 1280 x 720 59.94 fps. White markers applied manually and removed in post production. Deviation 0.5 pixels. Rolling Shutter corrected. Individual videos avaible below.

Main techniques : Camera Tracking, Trackers Removal, Compositing, Color Grading

Original

Focal length

Undistorted Unrolled

Detracked

Camera Tracking

Reference Images

Notes

A Big thanks to Simone and Teresa for trackers placement and car.

 

WebGl – Head

RealTime Model Visualization
Bokeh, FXAA, CTM, Fog – Low and High Res

webgl
Full Screen View – Watch Now

 

The dolly

Camera Tracking Session

Camera Tracking Session

Camera Tracking done on handheld D3200. Source 1280 x 720 59.94 fps. Red and White markers applied manually. Deviation under 1 pixel. Rolling Shutter not corrected so the deviation can be about 0.4 pixel lower. Individual videos avaible below.

Fast Object Reconstruction

Original

Undistorted

Camera Tracking

 

Spumante

VFX Camera Tracking, Dynamics, Rendering

Time Freeze Shot. Actions done: DeGrain, DeRolling, Undistort, Camera Tracking, Object Tracking, Fluid Simulation, Scene Setup, Fluid Pass Rendering.

Camera Settings

Canon 7D – CMOS Sensor, Sensor Size: 22.3 x 14.9 mm, Crop Factor 1.6, Optic: Sigma 10-20mm F4-5.6 EX DC HSM, Shooting Optic: 10 mm F4.0

Original Shot

Rolling Shutter

Checkerboard

Degrain

 

grain degrain

Undistort

Original

frame

Manual

frame_und_nuke

Final Fluid Pass

Spumante Fluid Pass

Spumante Fluid Pass

Uncomposited Raw Fluid Pass Rendering.

 

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My name is Giovanni Di Grezia, but people call me xgiovio.

Here is my homepage: .

I am a VFX Artist and Software Developer

And this is a picture of me.

Giovanni Di Grezia