Motion Vectors Menu Settings

The Motion Vectors menu is divided into two tabbed sections: Controls and Texture.

Controls Tab

Motion box: Use Analysis to analyse in Action the media assigned to the map by using the Analysis tab. To use motion analysis data from outside Action, use the other options. Forward/Backward: In the map, the forward motion is in the media front, the backward motion in the media back. Forward or Backward: Either forward or backward motion is available in the assigned media. Batch Motion Analysis provides Forward and Backward motions.
Effect field: Displays the amount of displacement applied. Editable.
Softness X field: Displays the amount of X-axis blur applied to the Motion Vectors map. Editable
Softness Y field: Displays the amount of Y-axis blur applied to the Motion Vectors map. Editable
Motion Vector button: Enable to have this Motion Vector map contribute to the Motion Vector render pass output by Action.

Texture Tab

(a) Repeat Mode box (b) Mapping box (c) Camera Type box (d) Fit Method box (e) Filter box

Repeat Mode box: Select how the parallax map pattern is repeated on the surface.

Fit Method box: Select a fit method option to be applied to the parallax map.

Keep Aspect button: Enable to preserve the aspect ratio of non-square pixels (not available for the Fill fit method).

Use Cropped Size button: Enable to replace the parallax map with the cropped size of the parallax media. Disable to use the cropped parallax media as is.

Mapping box

Select the type of texture mapping.

Wrap (Geom UVs) Wrap mapping completely envelops the 3D model with the texture map according to the object’s texture coordinates. To use this option, you must import a model that has its own texture coordinates. When using Wrap mode, you can also apply UV mapping settings from the Geometry menu.

Plane Planar mapping applies the map without distorting the front plane of the 3D model, similar to a movie projector casting an image onto a screen. All 3D coordinates of the geometry are mapped to this plane to generate the texture values. Planar mapping positions the lower-left corner of the map on the 3D model’s axis. When you apply planar mapping, any surfaces on the 3D model perpendicular to the front plane cause the pixels at the edge of the texture to project along the “sides” of the object.

Perspective Perspective mapping is similar to planar mapping, except that it performs a perspective transformation of the map based on the selected camera’s field of view (FOV). When you select Perspective as the mapping type, the Perspective Camera box becomes active, allowing you to specify the active camera. The FOV of the camera has an impact on the resulting effect of any transform applied to the parent axis of the texture. On stereo cameras, the interaxial distance between left and right cameras also has an effect on the resulting perspective transform.

Projection The texture behaves as if it is projected by the selected camera. Projection mapping is useful as an alternative to projecting textures using the Projector node, especially when it is necessary to project while preserving a specific camera POV.

Perspective Camera box: Specify which camera's FOV to take into account when using perspective or projection mapping.

Perspective Camera field: Displays the active perspective or projection camera number. Non-editable.

Stereo Camera Projection box: Select whether to use the centre, left, or right camera from a stereo camera rig when projection mapping.

Filter box

Select the type of filtering to apply to the parallax map.

Select:	To apply:
Nearest	No filtering — the pixel of the texture closest to the screen pixel is displayed.
Linear	Basic bilinear filtering.
Anisotropic	Non-proportional filtering between X and Y (faster to process than EWA, but with a lesser quality).
Aniso+Linear	A combination of Anisotropic and Linear filtering.
EWA	A high-quality elliptical weighted average filter to produce enhanced rendering results (slower to process than other filters).
EWA+Linear	A combination of EWA and Linear filtering (offers the most advanced filter processing).

Tip: You can set the default filtering type in the Action Setup menu Preferences tab.

Camera Type box: Select the camera type visibility for the parallax map. For example, you can use this setting to apply a Left Eye and Right Eye camera type for two maps that are children of the same surface or geometry in a stereo scene.

Analysis

Motion Estimation

Resolution field: Defines the scale of the image to consider in the analysis, 1 being full resolution.
Smoothness field: Controls the spatial coherence of the generated movement.
Edge Preserve field: Constrains the motion analysis to respect the edge information.
Colour button: Enable to use colour information. When disabled, RGB weights are used to compute the luminance of the input images.
Red Weight field: Controls the contribution of the Red pixels.
Green Weight field: Controls the contribution of the Green pixels.
Blue Weight field: Controls the contribution of the Blue pixels.

Region of Interest

Display Region of Interest button: Display the Region Of Interest (ROI). The ROI can only appear in a viewport set to Object (F8) view.
Enable Region of Interest button: Enable to analyze only the region defined by the region of interest. Defining an ROI improves performance and caching by considering a smaller area of the media. Vectors in an ROI can differ in precision from the vectors of the full image analysis.
ROI X Position field: Set the X coordinate of the center of the ROI.
ROI Y Position field: Set the Y coordinate of the center of the ROI.

Caching

Caching Start field: The first frame of the interval to consider when using motion vectors for tracking. Also used as the first frame to cache when Caching Range.
Caching End field: The last frame of the interval to consider when using motion vectors for tracking. Also used as the last frame to cache when Caching Range.
Cache Range button: If the map is set to Analysis, Cache Range analyses the motion of its assigned media, and caches the results. If the map is set to Forward and/or Backward, it caches the vectors of the provided motion vectors map. Caching is performed only on the interval defined by the Start and End fields. Disables Motion Estimation and Region of Interest options.

Clear button: Clear the cached motion analysis. Enables sections Motion Estimation and Region of Interest.
Auto-Caching button: Enable to analyze and cache the analysis as you play back or scrub each frame. Turn off Auto-Caching if you run out of space on your framestore.