v0.8.0

Animated voxel clips: author "GIF/MP4 for voxels" as their own documents, and
hang them off bones as animated layers.

Added

• Animated voxel clips (.rvc) — a new document type. A clip is a flipbook
  of voxel frames, sculpted with the usual tools and rendered by the engine:
  • Frames — add / duplicate / delete / reorder, each with its own duration
    (or a clip-wide default), plus a loop mode (loop / once / ping-pong).
  • Playback — play / pause and step with Space / , / ., scrub a
    bottom frame timeline; the playhead and the edited frame are one, so you
    stop on any frame and sculpt it.
  • Onion-skinning — ghost the previous (cool) and next (warm) frames while
    sculpting, so motion registers; the ghosts are never picked or edited.
  • Crop warning — when the bounding box dwarfs the content the clip warns
    and offers a crop-to-content that tightens every frame at once.
  • Files — New clip, Open / Export .rvc (the engine's clip codec), and
    lossless .demiurg clip projects that keep every frame's interior voxels.
• Clips as bone layers. Any bone attachment — a bone's base mesh or an extra
  layer — can be an animated clip instead of a static mesh:
  • Author in place — "To clip" turns the current mesh into a clip (its
    first frame), "+ Clip layer" adds an empty one, and "Import .rvc" drops an
    authored clip onto the bone; selecting a clip layer brings up the full clip
    editor (frames, timeline, onion-skin) to sculpt it inside the rig.
  • Plays on the posed rig — a clip layer animates in the Animate preview
    along the rig's playhead, with per-layer speed and phase so the same
    clip can run fast on one bone and slow / offset on another.
  • Round-trips through .rkc (the engine character container) and
    .demiurg; clip layers show their frame count in the Layers list.
• Select all — Ctrl+A selects every occupied voxel of the current model
  and switches to the Select tool, ready to delete / copy / move.