Two objects under one light, and only one of them casts a shadow. Turning that off per object is a pair of parameters: one enables the override, the other carries the value, and setting the value alone does nothing.
geo/ObjectProperties
Examples
Every one of these opens in the browser editor, running, with its node graph laid out for you to take apart. Nothing to install and no account needed.
A nameplate carrying colours, normals and a custom float, written to PLY three ways: everything merged into one mesh, only the first object, and as a scattered point cloud with no faces at all. PLY is the one format here that keeps arbitrary point attributes, and the one that can hold points with no geometry around them.