Step-by-step: Changing the mood
1Let’s start with a hot monochromatic palette. Here I’ve taken my original painting and colour balanced it to a hot red hue using the Hue/Saturation and Color Balance tools. To sell the change it’s worth adding a few additional details, in this case lava, some heat haze painted with a Soft brush and some embers! Now it feels aggressive and scary.
2Next up is another monochromatic palette from the opposite end of the spectrum: cold blue. For the details I find a reference photograph of an ice cave and use it to help me paint the icicles and to give the rocks a wet, icy feel. While simply hue-shifting it to blue would have been effective, these additional details all help to sell the snowy environment.
3Finally, I have fun with a creepy looking, analogous palette. I start by shifting to a blue palette with green midtones, then paint the green mist in using a Soft brush on a Soft Light layer. I add some reflections in the dark water and then adjust the image to give it a darker feel overall, which feels appropriate for the spooky setting.