To edit voxels, Voxel Edit Mode needs to be selected.
Desktop mode:
-Click the left mouse button to add voxel. Click the middle mouse button to remove voxel. Hold the mouse button and move mouse to add/remove voxels in a single plane. Plane is determined by the direction in which you are looking when first voxel is added/removed (for example look downwards to draw in horizontal plane).
+Click the left mouse button to add a voxel. Click the middle mouse button to remove a voxel. Hold the mouse button and move the mouse to add or remove voxels in a single plane. The plane is determined by the direction in which you are looking when first voxel is added or removed (for example, look downwards to draw in horizontal plane).
VR mode:
Press the trigger to add a voxel. Press the trigger while holding grip to remove voxel. Hold the trigger and move controller to add/remove voxels in a single plane. Plane is determined by the direction in which the controller ray points when first voxel is added/removed (for example point downwards to draw in horizontal plane). Hold both grips and move your hands together or apart to change size of edit sphere.