Thanks for your suggestions, but most are already possible in lite-C.

Rendering a sub-list of entities can be achieved with the IGNORE_FLAG2 mode. You can have an entity list, and temporarily or permanently set such a flag for all entities from the list.

Bones rotation is fast, thus storing bones matrices in a buffer is not worth the effort. You'll gain more speed when using bone indices rather than names. Rotating only a parent bone won't give any advantage.

For preventing button reaction on the mouse, set the button functions at NULL.

Lite-C can not do this because a semicolon is missing.