I was unsure what forum to put this in, so I took a guess. If you've ever used Microsoft Paint, Photoshop, or something similar, then you know holding shift lets you draw a straight line when drawing a line. I've taken a photo of the street surface, named it asphalt.jpg, put it as 256x256, and imported into unity. I added it to the textures you can paint the terrain with. I can indeed paint the asphalt fine, but I cannot seem to draw a perfectly straight line, as none of the brushes I see have a straight edge. I doubt if I could paint it THAT straight if I had a square brush as it seems a bit hard to draw a line only in one direction. Is there a command to paint only in a certain direction? Like Shift + Left Click while painting or something? Is there a way to design your own brush shape, square for example?