Working on heightfield implementation.
More work on heightfields.
Merge branch 'master' of https://github.com/highfidelity/hifi into metavoxels
Progress on rendering heightfield buffers.
Added scale field, fixed height/color extraction.
Translation, etc.
Working on heightfield encoding.
Merge branch 'master' of https://github.com/highfidelity/hifi into metavoxels
Working on heightfield transmission, merging.
Merge fix.
Collapse nodes when they fall out of LOD.
Fix for sizing.
Hide the unset (black) bits.
Merge branch 'master' of https://github.com/highfidelity/hifi into metavoxels
Attempting to fix the Linux build error.
Merge pull request #3229 from birarda/domain-server-auth

introduce the option to require payment for voxels
Use raw OpenGL textures rather than QOpenGLTexture, since that we're having
issues with constants in that class.
Merge branch 'master' of https://github.com/highfidelity/hifi into metavoxels
Merge pull request #3227 from ey6es/metavoxels

Basic metavoxel-based heightfields.
Merge pull request #3231 from birarda/domain-server-auth

add some error messages to PaymentManager