How to return the familiar selection mode from Blender 2.7 in Blender 2.8

In Blender 2.8 the selection mode has been changed. The “select all” command is still mapped to pressing the “a” key, but the “deselect all” command in Blender 2.8 is now mapped to a double-click of the “a” key or to the “alt + a” key combination. However, it is easy to return the familiar selection mode from Blender 2.7 – selecting and deselecting all by pressing one “a” key.

To do this, in the “Preferences” window in the “Keymap” section type “” in the search field. In the search results in the “Object mode” section in the line with “a” key snapping set the “Toggle” value to the “Action” parameter.

This will return the familiar selection in object mode.

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How to resize panels in Blender UI

In order to resize the T- or N-panel of the Blender UI, you just need to hold the edge of the panel with the mouse and drag it left or right. However, in this case, you can only change the size of the panel itself, but not the interface elements on it.

To change elements size and the font size of the panel, you need:

  • hover cursor on the panel
  • hold together the “ctrl” keyboard button and the middle mouse button (scroll wheel)
  • move the mouse up or down

This works not only for the side panels but also for all the “Properties” window.

Blender 2.80 release is scheduled for July

Blender 2.80 development plans from Blender Developers Blog:

  • The middle of May – the completion of the remaining features and finishing the user interface
  • The beginning of June – user documentation update
  • The middle of June – fixing of all critical errors
  • July – Blender 2.80 release
  • Blender 2.81 – 3 months after the release (patches and functional additions)

OpenGl – DirectX norma map converter node group in Blender

Normal maps are usually saved in one of the two most common formats: OpenGL or DirectX. Blender uses OpenGL specification. Trying to use normal maps saved in another format will result in the wrong visual effect. To convert normal maps to the desired format the “OpenGL – DirectX Normal Map Converter” node group from the BIS material library can be used.

The samples of use:

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Changes in add-ons registration through the API in Blender 2.8

Add-on registration and removing were made with the “Window manager” (wm) in Blender 2.7 Python API:

In Blender 2.8 API add-on operators moved to the “preferences”:


3D Cursor location in Blender 2.8 Python API

3D-cursor location property

in Blender 2.8 API moved to “cursor” object

When trying to get the cursor location through the “context.scene.cursor_location” Blender throws an error:

‘Scene’ object has no attribute ‘cursor_location’

Add-on preferences panel

When developing add-ons it is often necessary to give an ability to set a number of parameters that affect the whole add-on work to the user. For example, the user can specify a directory for saving/loading files, set some default variables or switch between add-on modes. Of course, the interface for setting such parameters can be placed in the add-on panel, but it is better to place it in a separate add-on preferences panel, which is located in the “Preferences” window under the add-on installation panel.

The main advantage of the add-on preferences is that they don’t reset when Blender restarts. The user does not need to configure the add-on preferences each time, it’s enough to set the necessary parameters once, personalizing the add-on for convenient work.

Let’s create an add-on and define a parameter, placing it in the add-on preferences panel.

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Matrix, vector and quaternion multiplication in Blender 2.8 Python API

In Blender 2.7 the “*” (star) operator is used in the matrix, vector, and quaternion multiplication. In Blender 2.8 it is replaced with the “@” (at) operator.

If the “*” operator is used in vector, matrix or quaternion multiplication in Blender 2.8 it throws an error:

Element-wise multiplication: not supported between ‘Matrix’ and ‘Matrix’ types

Proper use of the “@” operator: