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You can display both spherical video and live 3D scenes from the comp directly to headsets, including those from Oculus Rift and HTC Vive.
Fusion’s “Fix it in post” tools for VR make it easy to perform several important tasks that are common in these types of productions.
Lat Long Patcher [LLP]
The Lat Long Patcher node
NOTE: The VR category and Lat Long node are available only in Fusion Studio and DaVinci Resolve Studio.
NOTE: The VR category and Lat Long node are available only in Fusion Studio and DaVinci Resolve Studio.
NOTE: The VR category and Lat Long node are available only in Fusion Studio and DaVinci Resolve Studio.
Lat Long Patcher Node Introduction
Equirectangular stitched images often need patches, paintwork, or other VFX applied. The Lat Long Patcher extracts and de-warps a section of a lat-long (equirectangular) image to be treated, and can warp and merge fixes back over the original. You can quickly pick a section of the spherical image to patch or paint, and then apply it back to the original image. Note that matching rotations are used in both Extract and Apply modes, allowing a node’s operation to be easily reversed by a copy or instance with the same rotation settings.
Input
The Lat Long Patcher node includes two inputs. The orange input accepts a 2D image in an equirectangular format, where the X-axis represents 0–360 degrees longitude, and the Y-axis represents –90 to +90 degrees latitude. The effect mask input is provided, although rarely used on VR nodes.
— Image Input: The orange image input accepts a equirectangular (lat-long) 2D RGBA image.
— Effect Mask: The effect mask input is provided, although rarely used on VR nodes.
Basic Node Setup
The Loader node connects to the input on a Lat Long Patcher node. The output of a Lat Long Patcher node is set to Extract. It is then connected to whatever image-processing operation is required. A second Lat Long Patcher node set to Apply takes an input from the processed extraction and merges it over the top of the original source.
Two Lat Long Patchers used to repair a section
Inspector
The Lat Long Patcher Controls tab
Controls Tab
The Controls tab is used to extract and later reapply a section from an equirectangular image. Rotation controls allow you to select the exact portion you need to repair.
— Extract: Pulls a de-warped 90-degree square image from the equirectangular image.
— Apply: Warps and merges a 90-degree square image over the equirectangular image. Because the square image’s alpha is used, this allows, for example, paint strokes or text drawn over a transparent black background to be applied to the original equirectangular image, avoiding any double-filtering from de-warping and re-warping the original.
These buttons choose the ordering of the rotations around each axis. For example, XYZ rotates first around the X axis (pitch/tilt), then around the Y axis (pan/yaw), and then around the Z axis (roll). Any of the six possible orderings can be chosen.
These dials rotate the spherical image around each of the X, Y, and Z axes, offering independent control over pitch/tilt, pan/yaw, and roll, respectively.
Common Controls
The Settings tab in the Inspector is duplicated in other VR nodes. These common controls are described in detail at the end of this chapter in “The Common Controls” section.