Reference/Release Notes/2.79/a

Blender 2.79a: Bug Fixes

Changes from revision rBe8e40b17 to rB4c1bed0a, inclusive.

Total fixed bugs: 202 (117 from tracker, 85 reported/found by other ways).

Note: Nearly all commits from 2.79 are listed here (over 75% of total), only really technical/non-user affecting ones have been skipped.

Objects / Animation / GP


  • Fix #52932: Driver with target of custom property from scene fails to update (rBad834085).
  • Fix #52835: When driven IK influence change, ik animation have 1 frame delay (rB89de073e).
  • Fix unreported: Fix missing ID remapping in Action editor callback (rB9f6d5d67).
  • Fix unreported: #50354: Action length calculation added unnecessary padding if some F-Curves only contained a single key (on the last real frame of the action) (rBf887b8b2).
  • Fix unreported: Fix: Undo pushes were missing for Add/Remove Driver Variable buttons, and Remove Driver button (rB08e16e0b).

Grease Pencil

  • Fix unreported: Fix: When transforming GP strokes in "Local" mode, the strokes would get obscured by the transform constraint lines (rB99e4c819).


Dependency Graph

  • Fix #52432: Blender crashes while using Ghost (new depsgraph) (rB2213153c).
  • Fix #52741: Follow track with depth object crashes Blender with new depsgraph (rBd5dbe0c5).
  • Fix #53547: Metaballs as dupli objects are not updated with the new Depsgraph (rB8cdda3d2).
  • Fix unreported: Transform: Enable recursion dependency check for new depsgraph (rBef04aa4a).
  • Fix unreported: Depsgraph: Fix relations for metaballs (rB7103c6ef).

Data / Geometry


Curve/Text Editing

  • Fix unreported: Curves: Fix wrong bitset being checked against CYCLIC bit flag (rB2edc2b49).

Mesh Editing

  • Fix unreported: Fix for inset when accessed from spacebar search (rBdb3e3f9c).
  • Fix unreported: Edit Mesh: click extrude, ensure inverse matrix (rB3e3a27d0).
  • Fix unreported: Polyfill Beautify: option to rotate out of degenerate state (rB0834eefa).
  • Fix unreported: BMesh: use less involved check for edge rotation (rB58ab62ed).
  • Fix unreported: Avoid bias when calculating quad split direction (rB569d2df6).
  • Fix unreported: Beauty fill was skipping small faces (rB1b613053).
  • Fix unreported: Polyfill Beautify: half-edge optimization (rB4a457d4f).
  • Fix unreported: Use BLI_heap_reinsert for decimate and beautify (rBeaeb0a00).
  • Fix unreported: BMesh: move bridge tools stepping logic into macro (rB02b20678).
  • Fix unreported: Subsurf: Avoid global lock for loops and orig index layers (rB83b06030).
  • Fix unreported: Subsurf: Avoid possible use of partially initialized edge hash (rB72151f3e).
  • Fix unreported: Fix scalability issue in threaded code of Mesh normals computation (rB71e0894e).


  • Fix unreported: Fix (irc-reported by @sergey) invalid precision value in a float RNA property (rB8e43a9e9).

Material / Texture

  • Fix unreported: Fix logic for pinning textures users from context (rB8f9d9ba1).

Physics / Simulations / Sculpt / Paint


  • Fix unreported: Fix missing update for particles w/ fluids (rB84361a07).

Physics / Hair / Simulations

  • Fix #53650: remove hard limits on force field size and max distance (rB2a9abc0f).
  • Fix unreported: Fix error copying smoke modifier uv layer (rB9f032c38).
  • Fix unreported: Depsgraph: Don't make non-dynamic hair dependent on time (rB76032b13).

Sculpting / Painting

  • Fix unreported: Fix brush reset (missing notifier) (rB98dc9072).
  • Fix unreported: Fix sculpt secondary color missing some brushes (rB6058b651).

Image / Video / Render

Image / UV Editing

  • Fix unreported: Fix writing Iris images w/ invalid header (rBacae901a).


  • Fix #52840: New Depsgraph - Mask editor not working correctly (rB69062cdd).
  • Fix #52749: New Depsgraph - Render View Mask is not initialized correctly (rB53818251).
  • Fix #53419: Masking "Add" menu is not present in Image editor, but shortcut is (rBc8f95c78).

Motion Tracking

  • Fix #52851: Per-frame traking is broken when sequence doesn't start at frame 1 (rBf0743b56).
  • Fix #53612: Blender crashes on CleanTracks with 'DELETE_SEGMENTS' and a disabled marker (rBa1d05ac2).
  • Fix unreported: Tracking: Fix crash when tracking failed (rB350f5c68).
  • Fix unreported: Tracking: Create mesh from selected tracks only (rB333ef6e6).

Nodes / Compositor

  • Fix #53360: crash with GLSL bump mapping and missing group output node (rBbb897596).
  • Fix #52299: X resolution of 4 causes nodes to collapse (rBcdc35e63).
  • Fix #53371: Keying Node fails with values above 1 (rB1c7657be).
  • Fix #52113: Compositor doesnt mix unrendered render layers well (rB31823366).
  • Fix #53263: Proposed Blender crashes when rendering with Stabilizer 2D node without movie selected (rBce35151f).
  • Fix #53696: Compositor HSV limits changed (rB528e00da).
  • Fix #52927: Compositor wrong scale when scale size input is connected to complex node (rB259e9ad0).
  • Fix #47212: Luminance Key not working with HDR and out-of-gamut ranges (rB13973a5b).
  • Fix unreported: Fix compositor node links getting lost on file load for custom render passes (rB6bd1189e).
  • Fix unreported: Node selection: Stop operator when mouse selection selected a node (rBbf58ec92).
  • Fix unreported: Compositor: Ensured 16 byte alignment for variables accessed by SSE instructions (rB02bac54f).
  • Fix unreported: (Nodes) Display image name if any in the Image and Texture Image node title (rB010cf35e).
  • Fix unreported: Fix old files with changed node socket type not loading correctly (rB79563d2a).


  • Fix unreported: Fix incorrect color management when saving JPG previews for EXR (rB1dbdcfe9).
  • Fix unreported: Fix leak when rendering OpenGL animations (rBe4dce3b3).

Render: Cycles

  • Fix unreported: OpenVDB: Fix compilation error against OpenVDB 4 (rB0cdfe887).
  • Fix unreported: Cycles: Fix possible race condition when generating Beckmann table (rBb5c629e6).
  • Fix unreported: Fix Cycles bug in RR termination, probability should never be > 1.0 (rBdf1af9b3).
  • Fix unreported: CMake: support CUDA 9 toolkit, and automatically disable sm_2x binaries (rBcd9c68f0).
  • Fix unreported: Fix part of #53038: principled BSDF clearcoat weight has no effect with 0 roughness (rB440d647c).
  • Fix unreported: Fix incorrect MIS with principled BSDF and specular roughness 0 (rB866be342).
  • Fix unreported: Cycles: Fix possible race condition when initializing devices list (rB93d711ce).
  • Fix unreported: Cycles: Fix wrong shading when some mesh triangle has non-finite coordinate (rB075950ad).
  • Fix unreported: Cycles: Fix compilation error with latest OIIO (rB49f57e53).
  • Fix unreported: Cycles: Fix compilation error with OIIO compiled against system PugiXML (rBb6f3fec2).
  • Fix unreported: Cycles: Fix compilation error of standalone application (rB391f7cc4).
  • Fix unreported: Cycles: Workaround for performance loss with the CUDA 9.0 SDK (rBb3adce77).
  • Fix unreported: Cycles: Fix difference in image Clip extension method between CPU and GPU (rBa50c381f).
  • Fix unreported: Cycles: Fix crash opening user preferences after adding extra GPU (rBa3616980).
  • Fix unreported: Cycles: Fix bug in user preferences with factory startup (rB2f5a027b).


UI / Spaces / Transform

3D View

  • Fix unreported: Fix ruler access from search pop-up (rBb0fbe95a).
  • Fix unreported: 3D View: use shortest angle between quaternions (rB2895cb22).

Input (NDOF / 3D Mouse)



User Interface

  • Fix #52800: fix UI flickering with Mesa on Linux (rBc85a305c).
  • Fix #53630: Effect strips not disFix #52977: playing Input data. Parent bone name disappeared in the UI in pose mode (rB4bc89d81).
  • Fix unreported: Fix failure in our UI code that could allow search button without search callbacks, leading to crash (rBe8e40b17).
  • Fix unreported: Add some security checks against future bad float UIprecision values (rB7e4be7d3).
  • Fix unreported: UI: avoid int cast before clamping number input (rBa437b9bb).
  • Fix unreported: UI: fullstop at end of tooltips (rB4c3e2518).
  • Fix unreported: Fix incorrect allocation size (rB6b2d1f63).

Game Engine

  • Fix unreported: Fix BGE sound actuator property access (rBd2d20777).

System / Misc


File I/O

  • Fix #52816: regression can't open file in 2.79 (crash) (rBa4116673).
  • Fix #53002: Batch-Generate Previews generate empty or none image for large objects (rB47a388b2).
  • Fix #52514: don't clear filename when dropping directory path in file browser (rB625b2f5d).
  • Fix #53250: Crash when linking/appending a scene to a blend when another linked scene in this blend is currently open/active (rB06df30a4).
  • Fix #53572: Alembic imports UV maps incorrectly (rB0f841e24).
  • Fix unreported: Alembic import: fixed mesh corruption when changing topology (rBbae796f0).


  • Fix unreported: Fix potential string buffer overruns (rB30f53d56).
  • Fix unreported: Fix build with OSL 1.9.x, automatically aligns to 16 bytes now (rBf968268c).
  • Fix unreported: WM: minor correction to user-pref writing (rB75aec5ee).
  • Fix unreported: WM: don't load preferences on 'File -> New' (rB571e801b).
  • Fix unreported: WM: load UI for new file, even when pref disabled (rB9f0ebb09).
  • Fix unreported: Fix MSVSC2017 error (rB405874bd).
  • Fix unreported: Fix SGI foramt reader CVE-2017-2901 (rB7b8b621c).
  • Fix unreported: Memory: add MEM_malloc_arrayN() function to protect against overflow (rBa9727298).
  • Fix unreported: Fix buffer overflows in TIFF, PNG, IRIS, DPX, HDR and AVI loading (rB16718fe4).
  • Fix unreported: Fix buffer overflow vulernability in thumbnail file reading (rB04c51312).
  • Fix unreported: Fix buffer overflow vulnerabilities in mesh code (rB9287434f).
  • Fix unreported: Fix buffer overflow vulnerability in curve, font, particles code (rB8dbd5ea4).
  • Fix unreported: Fix manual lookups (data is now lowercase) (rBcae8c68c).


  • Fix unreported: Fix bpy.utils.resource_path('SYSTEM') output (rB21ecdacd).
  • Fix unreported: Fix setting the operator name in Py operator API (rB8c9bebfe).
  • Fix unreported: Docs: add note for bmesh face_split_edgenet (rBa253b1b7).
  • Fix unreported: Fix edge-split bmesh operator giving empty result (rBce6e30b3).
  • Fix unreported: Fix BMesh PyAPI internal flag clearing logic (rB6639350f).
  • Fix unreported: Docs: clarify return value for BVH API (rB0c456eb9).
  • Fix unreported: bl_app_override: support empty UI layout items (rB6d640504).
  • Fix unreported: Fix bad 'poll' prop callback API doc (rB3193045c).
  • Fix unreported: Fix background_job template (rB38357cd0).
  • Fix unreported: Fix bmesh.utils.face_join arg parsing (rB20cccb15).


  • Fix unreported: GPU: Fix memory corruption in GPU_debug on GTX1080 (rB3a1ade22).
  • Fix unreported: Task scheduler: Start with suspended pool to avoid threading overhead on push (rB8553449c).