In this tutorial, I’m going to show you how we can use back layering to get a better track. NOTE:  Frame-by-frame updates in Nuke’s interface can be expensive, and real-time playback can suffer as a result.The optimize Viewer during playback button in the Viewer tools stops updates elsewhere on the interface during RAM cache playback, helping to optimize the playback frame rate.See Using the Viewer Controls in the NukeGetting Started Guide for more information. You can see if you select the track shape, the selector changes accordingly. Displays the coordinates of the bottom left corner of the plane in the Viewer. Hello, I’m Dan Ring and welcome to the second tutorial to Nuke’s new PlanarTracker. As we don’t want any transform on the reference frame, and we don’t want to place our clean plate inside the planar surface, we can select the CornerPin2D (relative). 5:49. Mar 17, 2015 - Introduction to The Foundry's NUKEX 6.3 Tutorials on Planar Tracker, by Dan Ring. We also have a clean plate of the floor that a kind artist has drawn for us. Notice that I am moving the planar surface on the reference frame, and remember that any changes I make to the planar surface on the reference frame ripple throughout the shot. • CornerPin2D (absolute) - set the to positions to the corners of the planar surface, and the from positions to the dimensions of the currently selected node. For the tracking itself, almost everything is the same. Now, remember in the previous tutorial I mentioned the concept of a reference frame, internally the transforms and other frames are calculated relative to the reference frame. This usually happens on these kind of shots when the camera is moving into the scene. When enabled, you can adjust the plane using the four output indicators in the Viewer. I will also show you how to use additional track layers to create holdouts for tracks. Instead, we’ll go back to our floor track and go to our reference frame. Here, I’m reigning in the surface, which tells the PlanarTracker to care only about the transform relative to the floor and not the entire scene. We now connect the PlanarTracker node’s Mask input to the Expression node, and we’re now ready to track. You can use your tracking results to replace the tracked plane with another image for instance. You can adjust the indicator’s position by dragging it in the Viewer or by copying and pasting coordinates from other controls. - add or remove a keyframe on the current frame. If you ever noticed your Nuke script size is large, the tracking data from CameraTracker can be one of the culprit. That all looks pretty good, so let’s throw in our logo and we are good to go. PlanarTracker can handle approximately 40% of the surface being covered at any one time, but if the plane is fully obscured, you can manually correct the plane by moving it to a frame where it is not obscured and resume tracking from there. Visual effects dominate at the box office, and Nuke is the compositing software that is used at high-end studios to create those mind-blowing effects. • CornerPin2D (stabilize) - applies the inverse transform of the track to stabilize the image. We also have a Primatte node that I have already set up to pull a chroma key, and an Expression node for some hard cleanup. This means that we can lock the planar apparent motion type to T + Scale, meaning it will only track changes in translation and scale, and usually results in a much better track. This shows the currently selected track layer and its associated shapes. If we look at the feature tracks, we can see some very pretty, bird-like features in the sky. Now, let’s start the track. Specifies plane transformation from the reference frame to the current frame. For example, we want to see how well this part of the window frame tracks over time, and make sure that it also keeps as good a lock as the corners do. In these cases, it can be much easier to use a luma or chroma key to specify what areas you want to track, and Nuke’s PlanarTracker lets you do just that. • TSR + Shear - translation, scaling, rotation, and shear (move as if cutting through the scene). the many ways that mocha Pro is the ideal assist utility for NUKE VFX pipelines . MochaImport+ for NUKE simplifies using the tracking software mocha Pro with NUKE. Then, to create a track from within the Roto node, we simply right-click the shape and click planar-track this shape. I am going to draw a white border around the cable. Instead of using the node menu to create a PlanarTracker, we are going to start with a Roto node and draw the shape of the area we want to track. Before we export an absolute, we can save ourselves some time by selecting the Read node and then clicking the export button. First, I will show you what happens if we try to track the boat without using layers. You can see as we make a correction the Stabilize re-snaps the transform back into place. I will start by clearing all the track data to be saved (clear all track data) and then clicking track to end. Click to set the planar surface to the bounds of the input image. At this point, you might be tempted to say the cable does not fully occlude the boat, so why can’t you just track normally? Displays the coordinates of the outputBottomLeft indicator in the Viewer. Adjusting this value can be useful in preventing poor tracks in complex sequences. Sets the threshold for smooth track generation. Nuke Tutorials Let’s see what happens if we try to track now. That track looks very nice and is sticking very tightly to the ground. - browse to the previous and next keyframe. So, that concludes the second tutorial for Nuke’s PlanarTracker. The idea here is to try to track the sky in order to put a logo onto it. Now, let’s finally export our track data. Let’s put this track on a loop so we can see exactly what's happening. A rigid surface, like a wall or a side of an object, are good planes to track. Track complex organic surfaces through occlusions and blur using Mocha’s intuitive layer-based interface. So that track looks pretty good. To start, we need to assess the damage. We connect that up, and we create our Merge node as usual. Apart from looking very weird, it makes it very easy to look at, and correct, drift corrections. If we turn on the display tracks button, we can see why. You can use your tracking results to replace the tracked plane with another image for instance. Things like walls, ceilings, and sides of cars are good examples of planar surfaces, but it can also handle non-planar surfaces, such as faces or people -- generally, the more planar the surface, the better. Displays the coordinates of the top left corner of the plane in the Viewer. This option places the incoming image entirely inside the planar surface. PowerMesh enables a powerful new sub-planar tracking engine for VFX, roto, and stabilization. Planar vector tracker Nuke Software: Nuke Compositing Community and Resources; scripts, gizmos, plugins, tutorials It’s important to know that planar track layers interact with other layers. In this shot, we have a very slow pan from the sky to the ground. PlanarTracker (NukeX only) is a powerful tool for tracking surfaces that lie on a plane in your source footage. This is exactly what we want. PlanarTracker is a powerful tool for tracking surfaces that lie on a plane in your source footage. NukeX 6.3 Planar Tracker Tutorial: Tracking with Chroma-Keys from The Foundry on Vimeo. Let’s do that now. As soon as we have done that, our track should look much better. For our needs, we want a CornerPin2D (absolute). Saved from youtube.com. Once it is created, we can start drawing the area we want to track straight away. Let’s now close these property panels to get a better view. With the PlanarTracker, you use it to specify what areas you want to include in the track, whereas in the CameraTracker, you use it to exclude regions. You can see the Roto shape moved with the correction. We do this in exactly the same way as before. As it’s not moving, we don’t need to do anything else with this track layer. Sets the node type to export the track data: • CornerPin2D (relative) - warp the image according to the relative transform between the current frame and the reference frame. Then scrub in the timeline to make sure the results stick as they should. I’m going to rename the layer floor. As we want our logo to appear in this frame here, we are going to select our Read node, and then select CornerPin2D (absolute) and, as usual, we create our Merge node. Sets what type of camera movement is expected: • T + Scale - both translates and scales. You can adjust the indicator’s position by dragging it in the Viewer or by copying and pasting coordinates from other controls. It’s time to fix this track, and we do this by moving the planar surface corners when they are not on the reference frame. You might think that there would be some overlap between the tools in Nuke and Mocha Pro. This is now tracking much better in the middle of the shot, but if we look at the beginning, there seems to be something funny happening. Now, let’s close our display handles and set the track to look so we can see it better. Going back to our reference frame, we can move any of the four corners to other positions to help us eyeball when things go wrong. Sets a threshold value between 0 and 1. It’s also used to define where to place images in the scene. I’m going to speed up the recording to save time. If we move the corner points at any other frame, we are actually applying corrections and we don’t actually want that. However, it is difficult if you want to track one specific corner. Hi, I’m Dan Ring and welcome to the fifth tutorial for Nuke’s new PlanarTracker. This will automatically connect the CornerPin and select the correct image format. This means we don’t want to create an absolute CornerPin node, we actually want a relative CornerPin node. Now, if we go back to the Merge node, we can set the mask to rgba.alpha, and if we connect that to the Viewer, we should see that we have a nice holdout. That frame looks pretty good; let’s see how we did. This also means our Roto shape needs to have been drawn at frame 382, which I have already made sure to do so. This concludes our first tutorial on the PlanarTracker. NUKE Planar Tracker Tutorial by Escape StudiosNUKE STUDIO and NUKEX’s Planar Tracker allows you to track areas in your image sequence that lie on a plane. Browse more videos. We will get rid of the drawing handles and see how that track went. This is a common problem in tracking panning shots, where using the additional input of the PlanarTracker is very useful. 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