Underscan

Closer = more defined = more points

In V-Nova PresenZ, the amount of data collected for a surface depends on the surface’s distance from the ZOV. The closer a surface is to the ZOV, the more points are needed to represent it accurately in the rendered image. Therefore, the point density will be higher for closer surfaces compared to surfaces further away. Which is generally desirable.

When Underscanning is needed

But when getting too close to the ZOV, this process might start to generate too many details.

The underscanning system is designed to reduce the amount of data collected for surfaces very close to the ZOV, while still maintaining an acceptable level of accuracy. It aims to keep the collected data above a minimum point size for optimal display in a VR headset.

The default setting for the minimum point size is 1mm,

The underscan levels and factors are as follows:

underscan levels	0	1	2	3
underscan factors	1x	2x	6x	24x

Note: It should be noted that if a scene has objects very close to the ZOV and the rendering times and file sizes are too high, increasing the minimum point size might be beneficial. The larger the point size, the more underscanning will be triggered.