Uv Pass

A UV pass allows for gradient-based masking. For example, if a compositor needs to darken just the bottom half of a character's cape, they can use the V (Green) channel of the UV pass as a luminance mask to isolate the bottom portion of the geometry.

When imported into compositing software (e.g., Nuke, After Effects, Fusion), the UV pass acts as a map. The software uses a node (commonly called an or UVMap node) to read the pass:

, allowing only ultraviolet light to reach the sensor or film. The Look: It reveals patterns invisible to the human eye, such as hidden spots on flower petals or "sun damage" on skin. The Gear: To use one effectively, you usually need a "full-spectrum" modified camera, as standard digital sensors have internal filters that block UV. 2. In 3D Rendering & Compositing In software like Blender, Maya, or C4D, a UV pass (sometimes called a uv pass

To leverage a UV Pass, you generally follow this three-step process:

You input your UV Pass as the "map" and your new 2D texture as the "source." The software then sticks the texture to the 3D movement of the original render. Limitations to Keep in Mind A UV pass allows for gradient-based masking

The UV pass has numerous applications in computer graphics, including:

Enable the “UV” render pass in your renderer (Arnold, V-Ray, Redshift, Cycles). The output will look like a colorful, stretched image of your model’s unwrapped UV layout. The software uses a node (commonly called an

In your compositing software, use a node specifically designed for re-mapping (e.g., the STMap node in Nuke or the Map Flicker / RE:Map plugin in After Effects).

UV Pass – Ensuring Optimal Curing for Resins & Coatings