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HDR Painting with Krita, in the Beta branch!

Some of you may have already seen yesterday's announcement on Krita.org, and the video by Timotée Giet demonstrating HDR painting in Krita.
https://www.youtube.com/watch?v=esSzKzXVWQE
It's still being developed, and one of the Windows dev machines ran into trouble using the new LUT docker, so we're not pushing this out to everyone just yet, but you can enable the Beta branch to try it yourself.

Here's how to try out HDR painting:
First, switch to the "Beta" branch. You can do this by:

  1. Right-click on Krita Gemini in your Steam Library, select "Properties".
  2. Select the "Betas" tab.
  3. Select the "beta" branch (not a strict beta, more "unstable")

Now Steam should update Krita Gemini to this branch, and you will see "Krita Gemini [beta]" in your Library. You can follow the same procedure to return to the (default) branch.

To play with the HDR painting, using the new LUT docker:

  1. Create an OpenColorIO config, or download one from OpenColorIO
  2. Create a new custom image, you'll want to use RGB, 32-bit Float, scRGB (linear) Color.
  3. Open the Dockers menu under "Settings" and enable the LUT docker
  4. Enable OpenColorIO and select the .ocio profile that you previously downloaded
  5. You can adjust the gamma and exposure using the docker, or you can assign your own canvas-input shortcut.

To assign shortcuts to exposure:

  1. Select "Configure Krita" from the Settings menu
  2. Choose the category "Canvas Input Settings"
  3. Expand the "Exposure and Gamma" setting at the bottom and you can assign a shortcut for Exposure mode. We're going to set it so that holding Y and dragging the mouse up and down with adjust exposure (this may already exist)
  4. Select "Add shortcut..." and as type, choose "Mouse Button".
  5. Double-click on the center column entry "None". Click the entry for Mouse-Button and when it asks you for mouse-input, click the left-mouse button.
  6. Click the button for "Modifiers" and press Y on the keyboard.
  7. If the far-right column says anything other than "Exposure Mode", then click that entry and select Exposure Mode from the popup-list.
  8. Close the dialog and try it out :D

For more information, check out the article on Krita.org