I think the word you are looking for is guache or also spelled Gouache......You don't want to know what Quache means (in spanish)
It derives from the Italian word GUAZZO or water.
Quache, or gouache, is a paint that combines a deep, highly concentrated color pigment, a stabilizing/binding agent, and a material such as white chalk to make it more opaque. It covers well and dries quickly, making it a favorite for commercial artists.
There are more than one painting, named 'The Wave'. If you mean the one by Courbet, it is an oil painting. If you mean the one by Hokusai it is a color woodcut.
I think you mean an easel (?) Look up a picture of an easel and see if that is what you mean.
If you mean the painting by Futurist Umberto Boccioni, yes.
Etruscan painting was mostly used for decoration of tombs.
By wall painting, do you mean painting a mural or something like that. Depending on what you want the painting to look like, a smooth surface always works best. It can be drywall, plaster, wood. If this isn't the answer you are looking for, please explain a bit more about what you are thinking of doing.
peen
A picture or a painting
It's a painting by Chris Consani. Is that what you're thinking of?
it means that a character has a change in the way of nature in painting
It is a painting which shows other people what Latin meens!
When painting environments or specific compositions, math is used as a proportion and perspective tool.