Real Paint Photoshop Action 23246026
Work only with ENGLISH language photoshop (How to change language to English TUTORIAL).
Use the RGB Mode and 8 Bits color (Go to Image/Mode and check the RGB color and 8 Bits/Channel).
Set the Opacity brush and flow to 100% (Select Brush Tool and move Opacity and Flow slider to 100%).
Be sure the photo set Background from layer (Go to Layer/New/Background from layer).