Shades in the scene with a brush stroke pattern. Darker parts of the scene have a more noticeable stroke effect.
This effect requires the Drawing Texture to be set in order to work properly. An example is provided at Resources/Textures/DrawingTex.png.

Parameters
- Strength - How noticeable the effect is.
- Drawing Texture - The texture which encodes what the drawing pattern looks like.
- Animation Cycle Time - The number of seconds taken for one animation cycle (where a cycle involves the effect ‘bouncing’ twice by moving the UV coordinates used by the drawing texture).
- Tiling - The number of times the drawing texture is tiled (in the y-direction).
- Smudge - Strength of the additional UV smudging effect (pixels are translated slightly based on the colour value of the pencil effect at this pixel).
- Depth Threshold - Pixels past this depth (normalised between 0 and 1) will not be ‘drawn’.