From MagicaVoxel Community Wiki
Sky->IBL: Image Based Lighting. use ".hdr" format panorama images to light the scene.
Fog: add Equi-angular sampling back to reduce noises. support fogs in othogonal views in a bounding volume.
Sample->TR-Shadowto allow single direct lighting; enable
Sample->MIS-Cloudto allow multiple direct lighting (very expensive).
Colorall color options have their own color pickers which support HSV, RGB, H-Block and Hex values.
Palette Menuright click the palette view to show the pop-up menu.
Update log of the official github page.