But, the user still needs to understand the proces of using these simplistic tools. If you don't understand the idea of negative shapes or how to find a good composition, a viewfinder is not going to make you an artist. It'll make you into someone looking at the world through the hole in a rectangle.
Digital tools come under this same class for me, although I appreciate they are more complicated to work at times then the trusty viewfinder. For my most recent paintings of Kedleston Hall I wanted to focus on the architecture and how light plays off the different planes of the building. I didn't want to just draw a fancy house, I wanted to add my own creative flair and vision to what I saw.
So, I kept my colour palette simple. Like, really simple. Three colours in total to create each painting, which would keep things nice and harmonious so I could concentrate on the interesting compositions instead.
In photoshop I adjusted a reference photo to play with tonal contrast and composition, the best way I find to do this is when it's in black and white. Then I go back to the original photo and play around with colour. This helps me visualise lots of different combinations. Doing it digitally like this is a lot faster then trying to do it with traditional mediums, plus I can tweak them cleanly. The last image above has been pixelated so its easier to focus purely on the range of colours and no the compositions details.
Once I have my colours sorted, I can then choose which colours to have in my palette. From there I do a small mock up to help me figure out the best way to apply them and to get me used to mixing the colours. Then, when I come to create the final painting, i've already done all my prep so a lot of the stress has been taken away and I can relax and enjoy the painting process.