Hi , I am Japanese who is not good at English. It is a sentence translated by Google translation .
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1. I want the function of texture projection.

↓A description of this feature is summarized in the linked Google Slide below.
https://drive.google.com/open?id=1wrIwb1RcH5LqDLBcqPhUlruInchT1s8uLZF0HZsIISk

Texture projection is a powerful feature that is essential for texture creation. However, the software equipped with such a function is only in 3DCG software. If this function is included in 2D software, it is possible to efficiently give texture to concept art and matte paint work.
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2. I want you to make brush access more comfortable

I would like to register the second most frequently used brush as a shortcut key.
For example, I often use blender_basic, so while I hold down a specific shortcut, it becomes blender_basic, and if I release the shortcut, the function to switch to the original brush will be much more efficient.
It is a function that it is smooth_brush while pressing shift in the way of saying in zbrush.

↓How to register a secondary brush

hi, you can use the "use previous preset shortcut" by default it's "/" key :
- select brush 1
- select brush 2
= use the shortcut to switch between the two

Also there is Ten Brushes python script that allows you to set shortcuts for ten brushes so you can switch between them easily.

Thank you for replying mcoudert and tymond .

I did not know that Krita had such a feature!
Thank you for teaching me!