Paper texture can be visualized as a three-dimensional landscape made up of grains. The size, shape, and spacing of the grains determine the pattern and direction of the paper texture. When applying media to the canvas, brushes react to paper texture by coloring the grain peaks and ignoring the valleys. However, Corel Painter allows you to invert this effect to make color fill the grain valleys instead of the peaks. You can also resize the paper grain by adjusting the scale.
You can also invert paper texture by clicking the Paper options button in the Papers panel, and choosing Invert Paper.
The green brushstroke was painted with the paper grain inverted.
Scaling large textures can use a great deal of Random Access Memory (RAM). Most textures in Corel Painter range from 50 to 400 pixels square at 100% scaling.