A MetaDataPropertyMask contains is a 256-bit value to store bits corresponding to up to 256 properties of a node.
This is primarily used by groups and snapshots to specify which properties in a snapshot are to be applied. The vrBitsToInteger Lua function can be used to create an integer from up to 32 bit values.
int - Mask contents, stored as an array of 8 integers. Lua can access these using vrNodeArrayGetElement