Today, head outside and capture an image of warmth, using the sun as your source. And if the sun is nowhere to be found, don’t worry! You can interpret warmth in a different way.
When you light a subject from the side, the mix of light and shadow shows more depth and reveals textures, patterns, and complexities (even flaws) in the shot. It can create unexpected results, and be more dramatic.
The sun, coming from the side, was setting while I saw this wood panel on a shed. It created a nice texture.