Noise

Resolve 21 lists Noise among Image Pixel Tools. This article uses the main image input for a clear first result: Background establishes the working frame, while MediaIn lets you compare noise with source footage. Replace substitutes the processed values with the pattern; Add and Subtract modify them relative to the input.

Base and Colors answer different questions. Base selects the basis for random choice: position or color information. Colors selects how the output colors are obtained: Random or Selected. Changing Colors does not replace the Base selection, and Color does not automatically mean monochrome noise.

Compare Pixel and Grid separately. In the author implementation, Pixel groups coordinates by a pixel block size; Grid divides the image into a requested number of cells. Increasing Size X therefore makes a wider block in Pixel but more cells across X in Grid. Check this on one frame at a fixed Seed; size values are not interchangeable between modes.

Inspect noise RGB and alpha separately. Palette values and the selected processing channels can affect coverage, so an opaque source Background does not guarantee an opaque Noise result. The mask lesson explicitly selects Luminance in Bitmap and then connects its Mask output to the Merge Effect Mask.

Random Seed and Random Seed Offset select random variations. Fixed values do not create motion by themselves. Offset keys can switch the pattern discretely; this changes the random variation rather than moving the same texture across the image. Check individual frames and key interpolation before judging the animation.

The minimal graph on this page presents the reviewed Input → Output path. The supplied screenshot shows Controls, not a complete current Flow input list or an expanded Selected palette. Local blending therefore uses an external Merge; inspect any additional controls in the installed version directly.