Question about the world mesh file

[dklee98]

Could you let me know how to make the ply file of the gazebo world in the mesh/world_name/preview folder?
i want to change the overallMapVoxelSize but the existing ply's leaf size is too large for me, so that i want to make the ply file again.
I would be very grateful if you could let me know.
If it's secret, can you tell us what tools or open source you used?

thank you!