To terraform is to make a place earth-like. I see it as also literally meaning Earth Form. Since my part of the planet is very green, with many rivers, lakes and ponds, I see earth-forms in the greens and blues, with touches of red clay. I think of it as formed because of the manmade look of many of the shapes, suggesting fields, waterways, and dams. Terraform was created using an assortment of painting knives, squeegees and plastic palette knives, and even the odd brush.