Much of the stuff I am talking about can best be appreciated by actually standing in front of the actual painting, not something we can do so easily here in south east Asia.

Google arts and culture images give some idea as to the differences I am talking about. Below are two links, one to a Rubens painting one to Hoppers. Use the zoom function to show their incredible detail. A godsend for teaching.

Rubens was perhaps the most skilled painter to have ever lived, but has frequently been critiqued for his lack of content.

Hopper treated colors ‘locally’. This means that a red thing would be painted with red paint, and a blue thing with blue paint. Like a child with a coloring book. I show students how to moderate hue, saturation, lightness amusing a range of pigments.

If you have time, check out the difference between the two.

https://artsandculture.google.com/asset/the-wrath-of-achille...

https://artsandculture.google.com/asset/nighthawks-edward-ho...