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Blender Developer Meeting Notes: December 23, 2019


jesterKing writes:

Notes for meeting of Monday, 23 December 2019. 18:00 CET / UTC 17:00 on #blender-coders on


Holiday Period

  • Nathan Letwory will be around for anything on development coordination / onboarding. Please remember to tag him directly (@jesterKing) on if you need to talk to him.
  • Ton Roosendaal and Sergey Sharybin will still be around as well, for anything else.

Changes / New Features

Fluid Simulation

  • A new system for smoke and fluid simulations - Mantaflow ( Sebastián Barschkis )


  • Initial support for UDIM images ( Lukas Stockner )


  • Added option to playblast only keyframes of selected objects ( Sybren A. Stüvel )
  • Clarified tooltip for Viewport Render Animation ( Sybren A. Stüvel )

User Interface

  • De-duplicate mask context menu ( Campbell Barton )
  • Tweaks to the brush Stroke panel ( William Reynish )
  • Brush Settings overhaul ( William Reynish )
  • Remove orphan datablocks directly from File->Clean Up menu ( Antonio Vazquez )
  • Use DPI scale for transform cursors ( Campbell Barton )
  • Prevent crash when opening file browser with mouse not in window ( Sybren A. Stüvel )
  • Hide dopesheet slider options for Annotations ( Antonio Vazquez )


  • Object: ‘Affect Only Origins’ support for ‘Clear Transform’ ( Campbell Barton )
  • ID Management: Improve speed of code used when creating/renaming an ID. ( Bastien Montagne )
  • Workbench: Force Vertex Colors in Paint Mode ( Jeroen Bakker )
  • Sculpt: Use more saturated colors in the cursor ( Pablo Dobarro )
  • Industry Compat keymap: Add support for the context menu PC keyboard key ( William Reynish )

Weekly Progress Reports

About the Author

Avatar image for Bart Veldhuizen
Bart Veldhuizen

I have a LONG history with Blender - I wrote some of the earliest Blender tutorials, worked for Not a Number and helped run the crowdfunding campaign that open sourced Blender (the first one on the internet!). I founded BlenderNation in 2006 and have been editing it every single day since then ;-) I also run the Blender Artists forum and I'm Head of Community at Sketchfab.


  1. I used blender to my industrial designs and printing but ugly thing in my work is converting RGB colors to CMYK . unfortunately blender don't support CMYK color space :(

    • Hi, Decopaj.

      If you would like to use open source CMYK converting, try Scribus page layout application. You render in Blender, make your composition in whatever graphics application you like, and output in Scribus.

      No CMYK suport is not a drawback in Blender. CMYK is so specific to printing press oriented appliacations that you have to rely on special software for that purpose.

    • I'm a book publisher and I have to say that there aren't CMYK colors on the screen, only over paper, since our screens work with RGB colors. CMYK colors on screen is only an illusion to keep us more confident about our work. But, as Mihaly said, you can use Scribus to convert your images. It's simple and it's free.

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