This is necessary when working with post-multiplied images to ensure that the grain does not affect areas of the image where the Alpha is 0.0 (transparent). When the Alpha Multiply checkbox is enabled, the Film Grain node multiplies its results by the source image’s Alpha channel. Higher complexities produce visually more sophisticated results, without the apparent regularity often perceivable in digitally-produced grain. When complexity is set to 4, the node calculates four separate grain layers and applies the mean combined result of each pass to the final image. With a complexity of 1, only one grain layer is calculated and applied to the image. The Complexity setting indicates the number of “layers” of grain applied to the image. The Controls tab includes all the parameters for modifying the appearance of the film grain. Since grain is often removed from source material to achieve cleaner keys and composite, film grain is added back before the output to create a more realistic composite. The Film Grain node is commonly used before a MediaOut node in DaVinci Resolve or before a Saver node in Fusion Studio. An effects mask is applied to the tool after the tool is processed. Connecting a mask to this input limits the grain to be within the pixels of the mask. Effect Mask: The blue input is for a mask shape created by polylines, basic primitive shapes, paint strokes, or bitmaps from other tools.Input: The orange input is used for the primary 2D image that gets the grain applied.There are two inputs on the Film Grain node: one for the image and one for the effects mask.

This helps create the appearance that all elements were shot as a single scene with the same film stock. Typically, when compositing with different elements shot on film and in digital, the grain is removed for compositing operations and then reapplied to the final composite.

The Film Grain node adds generated film grain to an image.

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