voxeload allows to place voxel data into Minetest by mapping colors to
nodes.
usage
voxeload expects a nodemap mapping RGB colors to Minetest nodes, and
a voxel file in XYZRGB format.
The nodemap is a text file consisting of lines that contain 4 space-separated
values: a node name, and values for three color components in RGB color space
ranging from 0 to 255. It's the same format also understood by voxelizer
(https://github.com/appgurueu/voxelizer).
The voxel file consists of lines that contain 6 space-separated values, the
three coordinates X, Y, Z as integers, followed by the three color components
in RGB color space ranging from 0 to 255. It can be written e.g. by voxel-io
(https://github.com/Eisenwave/voxel-io).
/place_voxel <nodemap> <voxelmap>
Place a voxel object from file <voxelmap> with colors mapped to nodes as specified in the file <nodemap>