Jim, ah, drywall... sooooo much fun...
My hubby just bought a little gadget that seems like a miracle cure for his back so far... I have to go look up the name and website, and will PM it to you... might be helpful, who knows?
Maybe I could wear my purple leopard print fleece pajama pants to the opening?
I had mentioned in some post recently about watching how value relationships and color saturation change with distance. I found this little demo I did for a workshop, and thought I would share it here, in case SEEING what I was talking about might be helpful to anybody.
This is just on a piece of loose canvas, which was rolled up in a drawer, so sorry for the "role-y" appearance.
So there's the barn and tree, with a cast shadow from the barn on the grass.. Beside each image, I've painted squares of those values, so you can really see how things change with distance.
The top row is barn shadow side and light side.
The second row is tree shadow side and light side
The third row is grass, cast shadow, and sunlight
The bottom row is the dark of the barn door.
(this photo isn't perfect.. the grass values should be lighter overall, but just bear with me)
Notice two things:
1. As things recede into distance, the colors lose their saturation. Even the same object (barn, for example) will not be the same color further away as it is close up. compare the close up barn swatches with the distant barn swatches. Think of the air that is between us and whatever object in the distance as being layers of sheer curtain hung - the further the distance, the more layers of curtain, and so things get lighter and grayer and edges get softer... we're looking through lots of atmospheric curtains. Yellows turn duller, often a greenish gray, blues get lighter and grayer, reds lose their warm red color and start to turn dull purple. Eventually, given enough distance, everthing fades to a pale gray.
2. The values between light side and shadow side get closer. While there may be alot of contrast close up, as things get further away, the difference between what is in light and what is in shadow gets less distinct.. sometimes the only difference is a color temperature change, rather than a value change.
okay, 3 things... There is also less detail as things move away from us. While we might see windows and door casings close up, way in the distance, those small details become lost in the larger mass. And, as I mentioned, edges get softer.
Here's another shot. I cut out the close up barn and pasted it into the distance. Notice how the values of the barn and tree now do not match. They just don't look right now..
This just illustrates that EVERYTHING in a given plane has to relate in terms of value. Where this often gets us is in painting in a shadow in the distance, or any kind of dark accent. we paint them too dark. Those darks will never be as dark far away as they are close up.