Edge despill nuke

Give Feedback Support Portal. Although ChromaKeyer automatically despills the matte when you select a screen color, you may find that you can improve the matte by manually despilling the key using a despill bias or by replacing color at the edges of the matte. The despill bias allows you to specify a color from the image, separate from the alpha biasto improve the overall despill for the matte.

Typically, you should pick skin tones or hair colors for the despill bias. Selecting the hair color despills the blue pixels, producing a better matte. Improving a matte by adjusting the alpha channel can remove the wrong amount of screen color from the pixels where transparency has changed. The replace controls instruct ChromaKeyer how to deal with these pixels. The replace mode controls which pixels inherit the replace color.

This is the default operation. Pixels closer to the background have more background bias and pixels closer to the foreground have more foreground bias.

This gives a more subtle result than the edge hard color option. Highlighted pixels replaced by the color picked from the Viewer. Yes No. If you can't find what you're looking for or you have a workflow question, please try Foundry Support. If you have any thoughts on how we can improve our learning content, please email the Documentation team using the button below.

All Files. Nuke Search Tips Search is based on keyword. Despilling and Color Replacement Although ChromaKeyer automatically despills the matte when you select a screen color, you may find that you can improve the matte by manually despilling the key using a despill bias or by replacing color at the edges of the matte.

Custom Despilling The despill bias allows you to specify a color from the image, separate from the alpha biasto improve the overall despill for the matte. Enable custom despill bias to allow you to use the despill bias controls. Click the color swatch next to despill bias to activate the eye dropper.

This averages the pixels in the area selected to produce a better result. Blue screen pixels present in a default matte. Color Replacement Improving a matte by adjusting the alpha channel can remove the wrong amount of screen color from the pixels where transparency has changed.

Click the color swatch next to replace color to activate the eye dropper. This averages the pixels in the selected area to produce a better result. Image with edge soft color highlighted. Use the replace amount slider to control how much of the replace color is applied.

edge despill nuke

Disable the premultiply control if you don't want the output premultiplied by the alpha channel. Did you find this helpful? Sorry you didn't find this helpful Why wasn't this helpful?Removing any spill while still maintaining the original colors in the plate 2. Blending the subjects edges with a BG colors. If you are new to the concept of blending your despill with the background then you are really going to like this video. He talks about flame in the beginning of the video and switches to nuke later.

Sorry for not posting in a couple months, I have been traveling and working. But I am ready to finish off this series.

I think you guys will like this one because I go over some techniques on the IBK workflow. There are 4 examples a greenscreen, a bluescreen, a hair problem, and a shadow problem that I go over and explain the concept of what the IBK is doing, and the importance of the IBK Color, or cleanplate. Something must have gone wrong during the recording process, but you should still be able to see me clicking and marquee-ing stuff. Skip to content Compositing Mentor For those striving to learn as much about compositing as possible.

By continuing to use this website, you agree to their use. To find out more, including how to control cookies, see here: Cookie Policy.Give Feedback Support Portal. ChromaKeyer is a green and bluescreen keyer that can take advantage of the local GPU. Use the matte parameters to improve the matte. Local GPU displays Not available when:. You can select a different GPU, if available, by navigating to the Preferences and selecting an alternative from the default blink device dropdown.

You should also select this if you wish to render from the command line with the --gpu option. Use this option on shots that can only be keyed using several different keys on different parts of the image multipass keying.

This renders the original source image with the matte generated in this node. In ChromaKeyer nodes down the tree, you should set the inside mask control to source alpha.

You can produce unpremultiplied output by disabling the premultiply control. This averages the pixels in the area selected to produce a better key. Adjusts how much of the screen color is removed to make the screen matte. Increasing this value keys more. Sets the balance point for the image to key.

Tag: despill

If the key is not working too well with the default setting, try setting the balance to about 0. Controls how much of the chroma difference between the source image and the screen color is used to correct the matte.

edge despill nuke

Increasing chroma gain generates a matte that has less transparent areas in the foreground, but can produce harder edges. Sets the error threshold used for correcting the foreground. All alpha values above this point are set to 1. Sets the error threshold used for correcting the background.

All alpha values below this point are set to 0. Pick the color from the part of the foreground that is affected. If you're using multiple ChromaKeyer nodes to pull several different keys on different parts of the image multipass keyingset inside mask to source alpha to add up the results of previous ChromaKeyer nodes. Adjusts the despill bias to remove any remaining spill from around the foreground image. The most useful colors to pick for despill bias are often hair colors and skin tones. Sets the color method to use for pixels where the alpha of the matte has been modified:.

Despilling and Color Replacement

This produces a more subtle result than the edge hard color option. When enabled, add the replace color into areas corrected using the matte black point and white point controls to enhance the despill effect. When replace mode is set to edge hard color or edge soft colorsets the color to add where the alpha of the matte has been increased by the mask.

Premultiplying the matte can remove noise from the background, but it can also be too aggressive in some areas, such as hair. Keying with ChromaKeyer. Yes No. If you can't find what you're looking for or you have a workflow question, please try Foundry Support. If you have any thoughts on how we can improve our learning content, please email the Documentation team using the button below.

All Files. Nuke Search Tips Search is based on keyword. When set to ignoreany upstream keys are not taken into account. Sorry you didn't find this helpful Why wasn't this helpful?Give Feedback Support Portal. Keylight is an industry-proven color difference keyer. Use the Screen Matte parameters to improve the matte. All rights reserved. The Outside Mask, or garbage matte, used to remove unwanted objects lighting rigs, and so on from the foreground.

The Inside Mask, or holdout matte, used to confirm areas that are definitely foreground. It does not include any inside or outside masks. This is used to firm up the foreground matte to stop print through. The outside mask is used as a garbage mask to reveal the background. Use this option on shots that can only be keyed using several different keys on different parts of the image multipass keying.

This renders the original source image with the Screen Matte generated in this Keylight node. When disabled, the key result is not unpremultiplied. Adjusts how much of the screen color is removed to make the screen matte. Increasing this value keys more. Sets the balance point for the image to key. Generally speaking, blue screens tend to work best with a balance of around 0.

If the key is not working too well with these settings, try setting the balance to about 0. Pick the color from the part of the foreground that is affected. Adjusts the Despill Bias to remove any remaining spill from around the foreground image.

edge despill nuke

The most useful colors to pick for Despill Bias are often hair colors and skin tones. When enabled, use the Alpha Bias color as the Despill Bias color. When disabled, set the Despill Bias color separately. Adjusts how much you want to soften the foreground image used to generate the key. Sets the cut off point below which alpha values in the Screen Matte are set to zero.All the same Lynda.

Plus, personalized course recommendations tailored just for you. All the same access to your Lynda learning history and certifications. Same instructors. New platform. So I'll subtract the despilled image…from the original green screen…with this Merge node set for minus.

Then we add this to our original Keylight like so. Are you sure you want to mark all the videos in this course as unwatched?

This will not affect your course history, your reports, or your certificates of completion for this course. Type in the entry box, then click Enter to save your note. Start My Free Month. You started this assessment previously and didn't complete it. You can pick up where you left off, or start over. Develop in-demand skills with access to thousands of expert-led courses on business, tech and creative topics. Video: How to fix despill artifacts.

You are now leaving Lynda. To access Lynda. Visit our help center. Preview This Course.

Introduction to color correction in Nuke

Course Overview Transcript View Offline Exercise Files - [Instructor] If the despill coming out of a keyer…is a problem,…there's no way to mask off the spill supression…inside the keyer…so the only solution is to fix the artifacts downstream. Resume Transcript Auto-Scroll. Author Steve Wright.

Inputs and Controls

Every VFX artist must master this complex subject to succeed in the industry.Main Repository Page Gizmos Keyer. This location is for Registered Users Only. Perhaps you need to login or register. Contributor: Andreas Frickinger. Collection of Despill algorithms with fine tuning option and spill matte export. Requirements: 6. Description Older Versions Collection of Despill algorithms with fine tuning option and spill matte export.

Andreas Frickinger Just double checked it again and couldn't see any clamping in RGB. The clamp in the middle is only clamping the alpha channel. Got a script you can send me where it's clipping? J Bills whoops - the version I was looking at was dated 16 Aug I see your v1.

Andreas Frickinger cool, good to hear! Andei Antonuk ADD mask input please. Ezequiel Cesana Hi! It says there's an error on this node, and loops the render forever. It seems deadline parses the output of the console searching for the word error and if it founds one, it understands the render as wrong, and tries to re render the task.

Max Alaev This gizmo is much better than expression for despill what i knew! Spencer Tweed Awesome! This is exactly what I was looking for - should be a default node in Nuke. Gregoire Verweijen How do I load this plugin on the renderfarm? I've got the init. If I understand correctly, because deadline doesn't load the interface for rendering, it is useless to add them to the interface via menu. Though when I submit a script, I get an error that I cant find the plugin.

Frank Rueter Are your render machines rendering with your user account? Gregoire Verweijen The machines are all logged in with user 'render'. On the workstation I have a different user account, but the gizmo is in the current users. The farm is rendering on a render license without interface. Frank Rueter I'd log in as the render user to verify this. Noldy Arno Anywhere I can find a tutorial or help file explaining this tool?

Refresh comments list RSS feed for comments to this post.All the same Lynda. Plus, personalized course recommendations tailored just for you. All the same access to your Lynda learning history and certifications. Same instructors.

New platform. And then we do our despill operation. Are you sure you want to mark all the videos in this course as unwatched? This will not affect your course history, your reports, or your certificates of completion for this course. Type in the entry box, then click Enter to save your note.

Start My Free Month. You started this assessment previously and didn't complete it. You can pick up where you left off, or start over. Develop in-demand skills with access to thousands of expert-led courses on business, tech and creative topics. Video: Steve Wright's adaptive despill. You are now leaving Lynda. To access Lynda. Visit our help center. Preview This Course. Course Overview Transcript View Offline Exercise Files - [Instructor] So far, we've seen that no matter…how you adjust the despill,…there'll be some region of the comp…where it just doesn't look right.

Resume Transcript Auto-Scroll. Author Steve Wright. Every VFX artist must master this complex subject to succeed in the industry. This course offers 12 hours of the most comprehensive and detailed training ever produced on the subject of keying, covering literally every aspect of the job. You can follow along with NUKE, the software featured in the videos, or with any other compositing software that offers floating-point math.

NUKE master trainer Steve Wright introduces several overall compositing workflows, as well as a myriad of tips and tricks and several keying techniques never before published. Learn about green-screen, blue-screen, luma, and saturation keys; spill suppression; color correction; edge refinement; and more.

We are proud to host this course in our library. Topics include: Creating an uber key Keying green-screen vs. Skill Level Intermediate. Show More Show Less. Related Courses.

Preview course. Nuke Essential Training with Steve Wright. Search This Course Clear Search. Welcome 3m 57s. Exercise files 1m 19s. Keying Workflows. A look at different keying workflows 6m 43s. Creating an uber key 2m 58s.

The nature of grain and noise 3m 57s.


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