Thanks @Sandman, some good insight there, appreciate your comments.

As I have many, many chunks, I think I need to look at loading and unloading these into the hash map. At the moment, they

are ALL placed into it even if you cannot see them on screen - so quite a big memory footprint and impossible to make

the world seem infinite.

1. If chunk has gone out of view, unload from hash map

2. If a chunk has come into view, load to hash map

Should only have say max of 16 chunks loaded at a time.

It is the chunks in the hash map that get rendered.

Thanks