Introduction
This document describes the control panels where the Frustum can be adjusted, including the adjustment options located at these control panels, namely
- at the FRUSTUM control panel,
- the ADJUSTER X control panels,
NOTE: This document supposes that you are already familiar with the concept of FRUSTUM. If not, then we first recommend referring to the following document:
Rendering
FRUSTUM Control Panel
On the LEDWALLS control board, the FRUSTUM control panel provides adjustment options for the FRUSTUM render pass:
IMPORTANT: The adjustments made here are applied to the FRUSTUM's image on every LED Wall.
After selecting this control panel, head over to the Pin Values panel to see the following pins:
Vert Resolution
Vert Resolution is short for Vertical Resolution. The most important parameter is the pixel resolution. It's up to you to select a resolution that's suitable for your production while not placing too much load on the GPU (at least match the resolution of the camera's video output).
Aximmetry requires the use of the vertical resolution of your main LED wall, as this can provide the best visual quality. The horizontal resolution is calculated automatically from the provided Aspect Ratio.
Its default value is 1080 pixels.
Aspect Ratio
The Aspect Ratio should be the same as the camera's video output (since some camera changes the aspect ratio by cropping).
Its default value is 16:9.
Edge Expand
There's always a certain amount of delay while any change in the position/orientation of the camera is reflected on the LED Wall. Therefore, it's not enough to exactly render the Frustum that the camera currently sees because any movement of the camera would cause the Frustum to partially slip out of the camera's Field-of-View.
Also, the camera lens will always have some degree of distortion. The frustum area projected on the LED wall will never be seen as a perfect rectangle through the camera. Its edges can shrink inwards, which has to be compensated for by expanding the area.
To compensate for these issues, you can specify an Edge Expand value that expands the area of the Frustum rendered. The Edge Expand value will act as a multiplier of the Frustum area, where 0 means a multiplier value of 1 (in other words, no change).
NOTE: Faster camera movements also require an additional increase in the Edge Expand's value to compensate.
Its default value is 0.1.
Preserve Resol
Preserve Resol is short for Preserve Resolution. By default, the system renders the enlarged Frustum (enlarged by the Edge Expand) view using the same pixel resolution you specified at Vert Resolution. This can lead to a drop in the quality of the Frustum's image as the same number of pixels is used to render a bigger image area. If you find this drop too noticeable, you can select the Preserve Resolution option, which will increase the pixel resolution proportionally with the amount of Edge Expand applied:
Use this feature with care, as it can cause a significant increase in the GPU load when used with larger Edge Expand values.
Outline
Outline highlights the area of the Frustum on the LED Wall.
Its color can be adjusted on the INPUTS control board / INPUT X control panel / Frustum Outline Color pin:
NOTE: To learn more about where you can turn ON the Outline, please refer to the following document:
Show Cam Frustum
Virtual Lens Parameters
The virtual camera is our point of view of the virtual scene in the virtual space. It mimics almost every characteristic of the studio camera.
The following parameters can be set arbitrarily, independently of the actual settings of the camera.
As the names suggest, they represent the virtual camera's Focus Distance, Aperture, and Exposure value.
ADJUSTER X Control Panels
You can make basic video adjustments to the Frustum image for each LED wall independently using the ADJUSTER X panels placed under the FRUSTUM control panel:
NOTE: Normally, you want to use LED walls with the same characteristics, so you won't need independent settings. In this case, simply select all the ADJUSTER panels and set their properties together.
After selecting any of the ADJUSTER X control panels, you should see the following pins on the Pin Values panel:
