Visibility for Billboard Groups (Legacy)

The BillboardGroup has two visibility options:

• Static

• Dynamic

Static visibility

The Static option draws all meshes at once, as if they were a unique mesh.

• The calculation of the visibility is done on a big box like all the grouped meshes, so just a single mesh is visible.

• This system is very useful in cases where the meshes are mostly always visible; that is, if one is very likely to see the others are visible.

• If the meshes are all visible, this system is the fastest in rendering.

Dynamic visibility

The Dynamic option determines, for each frame, which meshes to render.

• The downside to this system is that when the visible meshes change, the system must recreate the various rendering buffers, which is not really fast.

• This system is very useful in case there are many scattered meshes for the scene, which are unlikely to be rendered simultaneously.

• It is important to think about the system to be used, because in different situations each one has advantages/disadvantages that can affect the frame rate.