How to make the terrain bigger into this minecraft clone?

Questions
1

I tried to load a minecraft example, its it:

DrFrankxio/industrias-carmelo-v0.20

0.98.html (197.0 KB)

(Works in one file).

The trouble is, when i add 640 instead of 320 of render distance the game doesnt show me the caves or the trees of 320 render distance.

EDIT 1: I tried to render low count of additional terrain height, but any result :J …

DrFrankxio/industrias-carmelo-v0.20

I maintained as before.