Affinity Photo gives you the opportunity to digitally simulate the mixing of wet paint applied to a canvas.
Using the Paint Mixer Brush
The Paint Mixer Brush is pre-loaded with the Primary colour selected on the Colour panel. As you drag on the page, this colour blends with the colour of pixels underneath the stroke, giving a smudged appearance to the image.
By default, the mixed colour remains on the Paint Mixer Brush. However, the brush can be manually 'cleaned' at any time. As soon as you drag on the page with a clean brush, the brush will pick up the colour directly underneath it.
Alternatively, the mixed colour can be manually removed from the brush at any time and reloaded with the Primary colour. You can also set this to occur automatically every time you begin a new stroke.
To mix paints:
On the Tools panel, select Paint Mixer Brush.
On the Colour panel, set the Primary colour.
On the Brushes panel, select a brush type.
Adjust the context toolbar settings.
Drag on the page.
To simulate a clean brush (with no paint on it):
With the Paint Mixer Brush selected, do any of the following:
Set the Primary colour on the Colour panel to None.
On the context toolbar, click Clean Brush
To remove mixed paint and reload the Paint Mixer Brush:
With the Paint Mixer Brush selected, on the context toolbar, select Load Brush.