Finding highresolution content/ blocking-in stage
I used mattepaint.com because I needed many perspectives and photographic elements at a high resolution and also full exposure. I started by grabbing thumbnails and screenshots in order to block in the perspective of the main element. Using the Move Tool (shortcut V), I move and rotate the main middle ground image which will be the largest part of the painting. I also use the Show Bounding Box on my selected layers just because I find it easier to quickly grab the corners and rotate/scale/transform. And so I use the Lasso Tool to grab large selections of areas that I want to use and hit the ‘add mask’ button at the bottom of the Layer panel to quickly add masks. It is also helpful to use a hard solid brush (in this case I use the chalk brush) to help blocking in more tricky areas. This way I can keep everything non-destructive and switch images around and copy the mask if needed. It is also a useful habit to put the main elements in groups (shortcut Ctrl+g) and name them to keep things organised, working from background (sky) to foreground (closest to viewer).