Bump Map
Tiles an image across the surface and uses its grayscale values as radial displacement. Bright pixels push the surface outward, dark pixels push inward. This effect turns any photograph, texture, or pattern image into a 3D relief on the mesh surface.
Parameters
Amplitude- Maximum displacement in mm (0–20). Negative values invert the effect (dark pixels push out instead of in).
Image ID- Identifier of the uploaded image to use as a height map (integer). Select from uploaded images in the project.
Tile U- Number of times the image tiles around the circumference (0.1–10). Higher values repeat the image more times.
Tile V- Number of times the image tiles along the height (0.1–10). Higher values repeat the image more times vertically.
Offset U- Shifts the image in the circumferential direction (\u22121 to 1). Use to position the pattern.
Offset V- Shifts the image in the height direction (\u22121 to 1). Use to position the pattern vertically.
Twist- Skews the image diagonally as V increases (\u22122 to 2). Creates a spiral mapping effect where the texture wraps helically around the object.
Invert- 0 = normal (bright pixels push outward). 1 = inverted (dark pixels push outward).
How It Works
For each mesh vertex, the effect samples the image at the corresponding UV coordinate (with tiling and offset applied). The sampled pixel is converted to a grayscale value (0–1), which is then scaled by the Amplitude to produce a displacement along the ring normal.
The Twist parameter adds a V-proportional offset to the U coordinate before sampling, causing the image to skew diagonally — at Twist 1, the image completes one full horizontal shift from bottom to top.