… for Visual Effects

Tip #709: Lifesaving VFX Tips

Larry Jordan – LarryJordan.com

5 Tips to Simplify VFX Shots

The Wolf of Wall Street © Paramount Pictures, Red Granite Pictures, Appian Way, Sikelia Productions, EMJAG Productions. Visual effects by Brainstorm Digital.

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This article, written by Eran Dinur, first appeared in NoFilmSchool.com. This is an excerpt. Eran Dinur’s experiences as a visual effects supervisor who works on a variety of film and TV projects caused him to write “The Filmmakers Guide to Visual Effects.”

Here are five VFX tips to consider.

  1. Be careful with tracking markers. Any markers not part of a VFX shot will need to be cleaned up in post later. There’s no need for markers if the camera doesn’t move during the shot.
  2. Use green on green. The best color for tracking markers on a green screen is green (and blue for blue screens). Just make sure the markers are slightly brighter or darker than the screen itself (having a few types of green gaffer tape around is useful). If you can see the markers in the monitor, they are visible enough to be used for tracking
  3. Successful crowd tiling can save money on extras. When you can’t afford hundreds of extras, crowd tiling is a great alternative. It is also much cheaper (and faster) than CG crowd simulations and digital doubles.
  4. Beware of trying to fix shaky cam in post. Consider these two issues: First, every stabilization also requires a push in, and the bigger the shake, the tighter you’ll need to go. This means that on top of losing parts of the image, you also lose quality.
  5. Keep safety wires behind the actors. Removing safety wires and rigs is standard VFX fare. But not all wire removal shots are equal, and some can turn out to be very difficult and expensive. If wires (or other parts of the rig) cross in front of the actor, it will take some difficult reconstruction of the actor’s moving face, body, and clothing to remove them.

The other, even more significant problem is the fact that stabilization can eliminate the motion, but not the motion blur (there really is no trick in the VFX book to kill motion blur in the footage).

EXTRA CREDIT

Eran’s second 5 tips are in Tip #710. His complete article – and book – are worth reading.


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Tip #710: (More) LifeSaving VFX Tips

Larry Jordan – LarryJordan.com

5 more tips to improve your VFX shots.

VFX shot from Boardwalk Empire © Home Box Office (HBO). Visual effects by Brainstorm Digital.

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This article, written by Eran Dinur, first appeared in NoFilmSchool.com. This is an excerpt. Eran Dinur’s experiences as a visual effects supervisor who works on a variety of film and TV projects caused him to write “The Filmmakers Guide to Visual Effects.”

Here are five more VFX tips to consider.

  1. Shadow alert. Strong cast shadows on a sun-lit green screen can seriously damage the success of the shot, and you want to do anything you can to avoid this. On a sunny day, it’s best to set up the screen against the sun so that it’s fully in shadow (and the actors won’t cast their own shadows on the screen). 
  2. Don’t let elements break frame. When shooting VFX elements, you naturally want to have the element as big as possible in the frame for optimal resolution and quality. But you should also make sure that no part of the element breaks frame. Partial elements that get abruptly cut off are useless.
  3. Shoot VFX elements at high frame rate. Whether you are shooting elements of smoke, fire, debris, blood squibs, dust hits or splashes, it’s almost always better to shoot at a higher frame rate. This allows the VFX team to use the elements at a slower speed and still maintain full quality. Slowing down elements to make them feel bigger is a tried and tested technique.
  4. Black is the new green — sometimes. Green screens work well for people, or cars, or horses—basically anything that’s mostly solid. But semi-transparent elements like fire or water don’t extract well from a green screen. With a black screen, the extraction process is not based on hue but on luminosity.
  5. On set reference imagery is invaluable. Reference images of the set and its surroundings are indispensable for a variety of VFX tasks, from camera tracking to matte painting.

EXTRA CREDIT

Eran’s first 5 tips are in Tip #709. His complete article – and book – are worth reading.


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Tip #711: 5 Tips for Getting a Job in VFX

Larry Jordan – LarryJordan.com

Visual effects jobs are everywhere, but so’s the competition. These tips help you get ahead.

Fill your mind with images.

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This article first appeared in CGSpectrum.com. This is an excerpt.

Visual effects jobs are everywhere. Many movies, TV shows, ads and video games depend on VFX to tell their story. These days, almost every major show out there has some level of VFX. However, VFX is an extremely competitive market, so here are some tips to help you get ahead.

  1. Go to a school that specializes in visual effects. This is one of the best ways to gain a foothold in this type of career.
  2. Strive to be the best at your craft.
  3. Create an amazing showreel of your best work. When applying for visual effects jobs, your showreel will often be the first thing a recruiter sees. Be unique with your showreel, grab the recruiter’s attention and keep it.
  4. Never stop looking for inspiration. Continue to grow by feeding off your ideas. Don’t be afraid to try new things, they may not always work, but you’ll never know until you investigate them. When things start to get dull, you need to look for things you may have overlooked before.
  5. Be a great team player. One person can make or break a team. Be conscious of your attitude towards the people around you and what you’re working on. Don’t be afraid to have someone critique your work and vice versa.

EXTRA CREDIT

The article, linked above, contains videos expanding on these ideas.


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Tip #692: 10 Tips for Shooting Media for VFX

Larry Jordan – LarryJordan.com

Ten Ideas to Improve VFX Source Footage

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This tip, written by Tihomir Lazrov, first appeared in fstoppers.com. This is a summary.

Visual effects are not software magic that works with any footage. With video you have lots of still images per second and the process of making a composite needs to be automated as much as possible. Working on a frame by frame basis is avoided as much as possible. Here are 10 quick tips on the importance of shooting appropriate video content to help create realistic visual effects more easily.

  1. Include Camera Motion
  2. Shoot to Avoid Motion Blur
  3. Know the Camera Settings for the Footage
  4. Put Tracking Markers in the Shot
  5. Shoot on a Tripod If There’s Nothing to Track
  6. Avoid Fast Camera Moves
  7. Shoot a Blank Background Plate
  8. Shoot a 360° Environmental Map
  9. Use the Sky as a Blue-Screen
  10. Use Foreground and Background Objects for Tracking

EXTRA CREDIT

The article, linked above, has lots of details on these ten tips.


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Tip #693: 3 Quick Motion Tracking Tips

Larry Jordan – LarryJordan.com

Camera moves – Shutter speed – Depth-of-Field

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Ever have trouble getting good motion tracks for your visuals? The problem usually lies in the camera settings!

Here are three simple steps to follow to improve the quality of the source footage for a motion track:

  1. Make sure camera moves are not too complex and pay attention to parallax.
  2. Shutter speed heavily affects motion blur. Higher shutter speeds minimize motion blur and improve the image quality of visual effects. The recommendation is 1/200th or faster.
  3. Decrease aperture to increase the depth of field. This helps the computer track contrast points.

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Tip #694: What is Parallax?

Larry Jordan – LarryJordan.com

Reducing parallax is important in panoramic stills, VFX and Stereo 3D video.

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Parallax is the difference in the apparent position of an object viewed along two different lines of sight; say from the left eye to the right eye, or each lens of a stereo 3D video camera.

As the eyes of humans and other animals are in different positions on the head, they present different views simultaneously. This is the basis of stereopsis, the process by which the brain exploits the parallax due to the different views from the eye to gain depth perception and estimate distances to objects.

In addition to its use in making stereo3D believable, parallax is also used in panoramic images, visual effects and web design.

EXTRA CREDIT

Even if your camera setup is perfectly level, you won’t be happy with the results for panoramic images until you eliminate image parallax. Image parallax occurs when near and far objects don’t align in overlapping images. For example, if you’re shooting a scene that contains a fence line, each fencepost in Image 1 should line up with its twin in Image 2. You can eliminate the effects of parallax by placing the optical center of the lens (not the camera) directly over the point of rotation.

Learn more here


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Tip #673: Create VFX in Photoshop

Larry Jordan – LarryJordan.com

Photoshop is great for adding shapes and textures, but not for rotoscoping video.

Image courtesy of Pexels. com.
Photoshop is great at adding textures to video.

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This article, written by Audrey Ember, first appeared in PremiumBeat.com. This is an excerpt.

Here are a few Photoshop tricks you can pull off to quickly and easily add a little life to your video projects. Use these for specific shots, don’t try editing video in Photoshop.

To start, switch to Window > Workspace > Motion. This displays a timeline at the bottom of the interface.

Things You Can Do

  • Add Color and Texture. Use different brushes to create shading and highlights.
  • Create Interesting Titles or Text Overlays. In Photoshop, the possibilities are endless, whether it’s creating unique shapes or adding textures to text or backgrounds.
  • Use Animations to Add Emphasis and Interest. Add different designs to emphasize movement and create a more stylized looks to the background.

EXTRA CREDIT

The original article has videos that show the results of these tips.


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Tip #674: 51 Free Accent Animation Graphics

Larry Jordan – LarryJordan.com

51 Free Motion Graphics from PremiumBeat.com

Free Stuff!

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This article, written by Todd Blankenship, first appeared in PremiumBeat.com. With these FREE motion graphics, you can easily add elegant motion and animation accents to your titles and designs in any project.

Most of the time, those little extra touches are things like really small details and additional motion in small portions of the scene. These are things that the viewers might not even fully notice but, when added as part of a whole, these accents and animations can really bring your work to a whole new level.

We’ve made a pack of FREE motion graphics that you can use to add little accents of motion to your titles and animations.

Here’s the link.


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Tip #679: 9 Free After Effects Templates

Larry Jordan – LarryJordan.com

Cool Stuff to Improve Your Projects

The After Effects logo.

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This article, written by Annie St. Cyr, first appeared in PremiumBeat.com. This is an excerpt.

  1. 9 Digital Distortions. The digital distortions template allows you to simply drag and drop your footage into the composition and play with the motion parameters to get Noise, Color Boxes, Flicker, Tuning, Turbulence, Pixel Blending, Rolling Bars, Chromatic Aberration, and Color TV Pixels.
  2. The Anamorphic Look. The wider visuals of the anamorphic lens can add drama to your travel video or help draw focus to a character or element of a video you’d like to feature more prominently. This juxtaposition of usefulness has made the anamorphic highly sought after.
  3. Free Action Effects. Fire is one of the most difficult elements to pull off digitally. This free Action Elements Pack can be used in any NLE or motion graphics software. Adjusting the scale, motion parameters and alpha channels will provide you with some solid fire and explosion effects. It’s better than any fire template I have seen. These elements look much more realistic and require much less render time.
  4. Animated Fonts. With over 43 unique compositions, this animated font After Effects template can make any information much more invigorating. This skill is essential for your motion graphics tool kit. You never know when you might need a few animated letters or numbers to spice up your next edit.
  5. VHS Distortion. Just like the digital distortions pack, this free After Effects template allows you to recreate the look of an old VHS tape. Once again, all you have to do is drag and drop your footage. You can even customize the text. This template does require you to download a free font as well.
  6. Free HUD Elements. If you are looking for that futuristic HUD aesthetic this free After Effects template is for you. Below is a tutorial for how to create a Spider-Man: Homecoming-inspired look, but these HUD elements have a multitude of uses.
  7. Dynamic Car Gauges. Now that so many car commercials have gone digital, every video editor needs digital assets for commercial work and promos. With these 16 free After Effects car gauges, you can easily create a custom gauge for your car work. The download also includes 9 free sound effects.
  8. 20 Free Color Grading Presets. If you aren’t a color grading expert but want to add a great custom look to your footage, these 20 free AE color grading presets are fantastic. Each color grade adds a unique style and tone to your films and commercials. Check out all twenty presets in this video.
  9. Split Layers.If you aren’t the best with motion graphics, this free After Effects template instantly creates split layers to splice up your images or video. You just drop your footage into the project and select which of the nine types of layers you want.

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Tip #654: What is a B-spline curve?

Larry Jordan – LarryJordan.com

The key benefit of B-spline curves is their smoothness.

A simple B-spline curve, emphasizing it’s smoothness. (That corner isn’t a corner, it’s where two lines cross.)

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A B-spline function is a combination of flexible bands that passes through the number of points that are called control points and creates smooth curves. These functions enable the creation and management of complex shapes and surfaces using a number of points. (That’s what it says here, not that I fully understand it.)

The term “B-spline” was coined by Isaac Jacob Schoenberg and is short for basis spline. B-splines are more general curves than Bezier curves. More simply, a Bezier is a special case of a B-spline.

The big difference between B-splnes and Bezier curves is smoothness. B-splines are made out several curve segments that are joined “smoothly.” Bezier’s on the other hand, can have corners.

A B-Spline curve can be a Bezier curve whenever the programmer so desires. Further B-Spline curves offer more control and flexibility than a Bezier curve. It is possible to use lower degree curves and still maintain a large number of control points. B-Spline, despite being more useful, are still polynomial curves and cannot represent simple curves like circles and ellipses. For these shapes, a further generalization of B-Spline curves, known as NURBS, is used.

EXTRA CREDIT

I’d share the math of B-splines with you, but, frankly, I don’t understand it. A Google search will turn up lots of university references.


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