By creating tracking in 3DE, we have been using the Trackpoint mode.
When we come across a larger tracking point (like a distinct circle) that is easier to track on the screen, we need to use the [Marker] mode.
[Ctrl+Left Click] to create the tracker point. Select the [Marker] mode in the [Attribute Editor] in the [Trackingmode] on the right. Click on the [Gouge Marker] at least four times, and then click on [Track].
When we encounter a situation that the tracking points are obscured during a production project:
Tracepoints are created in two stages. The first stage is before the tracking point is obscured. The second stage is after the mask has been removed, and the tracking point is visible.
1. The tracking point is created in the start frame. [Ctrl+Left Click]
2. Observe the trace path of the tracking points. When observing an approaching keyframe, we can use the arrow keys (Left and Right) on the keyboard to confirm the information before and after the keyframe. When an object obscures the tracking point, select [End Point].
3.After the obscured object has been removed, create a new tracking point at the same location. Use [Page Up] and [Page Down] to see if the new tracking point’s position and the size of the border are the same as the previous tracking point.
(Repeated comparisons are required, so be patient.)
After we have established a tracking point. Click on [Calc All From Scratch] in [Calc].
Click on [Use Result] .
The mean curve values in the [Deviation Browser] are not stable enough at this time.
The value of the lens needs to be adjusted to ensure accurate tracking.
After adjustment, we will find that the [Deviation Browser] ‘s mean value is less than [1].
Click on [Parameter Adjustment Window] in [Windows].
Click on [Brute Force All] and then click on [Adjust]. Wait for a while, and the many red dots will appear as in the picture below. But this is not what we want. So click on [Clear] to clear it.
Click on [Adaptive All] and then select [Adjust]. This time the result is much better.
This time click on [Calc All From Scratch] in the [Calc] section. Click on [Use Result] again. The curves are much better.
Now we need to create tracking points on the person’s face. Before we can create the tracking points, we need to fix the camera.
In the [Camera] properties bar on the right, find the [Camera Constraints]. Adjust the properties of [Positional Camera Constraint] to [Fixed Camera Position Constraint]. This operation will give more depth to the tracked point in 3DE.
Click on [Calc All From Scratch] in [Calc] to observe. This time get a deeper trace on the image. Click on [Use Result].
The [Deviation Browser] ‘s mean value has now been adjusted to be closer to [0].
Click on [Parameter Adjustment Window] in [Windows].
Click on [Clear], click on [Brute Force All] and then click on [Adjust]. A nice 2D Line will be shown.
Now create a new [Point Group].
Create tracking points evenly over the person’s face.
In the [Point Group], select the second group of points for facial tracking of people. After double-clicking on the second group, select [3D Models].
Select [Import Obj File] in [Add New]. Right-click on the mask and select [Import Obj File] in [Add New]. Import the downloaded mask model.
In F6 (3D Orientation Controls), we can observe the imported models.
Select [New 3DE4 Window] to open a new window. We can compare models and tracepoints in these two windows.
Set the [Environments] in the right Window to [Orientation].
Now it’s time to match the tracepoints and the model. Select the tracking point in the [Basic] mode on the left. After that, select [Extract Vertex] on the right and then select the model’s corresponding point.
After all tracking points match the model, close the window on the right. Click [F5]. Click [Calc All From Scratch] in [Calc].
Click [Use Result].
The model will match the human face.
We need to double click the OBJ model in[Objective Browser]. Turn off [Model Contains Survey Data] from [3D Model].
Select the OBJ model and adjust the [Translate], [Rotate], and [Scale] to better match the human face.
After adjusting the model matching, select all of the tracking points in the background. Select [3D Models]. Select [Mesh From Points] in [Create] to create a 3D space of the background.
The 3D space is now shown in the background as a tracking space.
Delete the tracking points from the background. Select [Run Warp4] in [3DE4].
Change the name of the export path. Click on [Preview] and adjust the lower-left corner to [Source Footage]. Finally, click on [Render] and wait for a while.
Now we can export the file to Maya by selecting [3DE4] and choosing [Maya] from [Export Project].
Change the export settings.
Click on Camera, select [3DE4], select [File], select [Export], select [Export Nuke LD_3DE4 Lens Distortion Node].
Change [Filename]. Select [OK] to export the Nuke file.
I found no way to export my 3DE file into MAYA. When I put the exported file into MAYA that my model had disappeared.
Fortunately, I kept up with the course, and I remembered all the steps. I need more time to explore 3DE after class.