Nodo Mezclar

El nodo Mezclar.

Blends two images together, much like how an image editing program blends two layers.

Importante

As of Blender 3.4, this node has been updated in the Shader and Geometry node editors. Files saved with the new node are not backward compatible.

Entradas

Factor

La opacidad de la imagen de frente.

Image/A/Color1

The background image. Determines the dimensions of the output.

Image/B/Color2

La imagen de frente.

Keep in mind that, unlike image editing programs where the foreground layer is on top, the foreground slot in Blender is on the bottom.

Propiedades

Data Type Shader Editor Geometry Node Editor

The type of data to mix: Float, Vector, or Color.

Factor Mode Shader Editor Geometry Node Editor
Uniforme

The same single Factor is applied to all three Vector coordinates.

No Uniforme

You can specify a different Factor for each Vector coordinate.

Blending Mode

The blending mode to use.

Mezclar

Regular alpha blending. Typically called Normal in image editing programs.

Darken

For each color component, takes the smallest of the two values being blended.

Multiply

Multiplies the colors component by component. Blending with a white pixel (value 1.0) has no effect, while blending with a black one (0.0) always results in black.

Color Burn

Inverts the background color, divides it by the foreground color, and inverts the result.

Lighten

For each color component, takes the largest of the two values being blended.

Screen

Inverts both colors, multiplies them, and inverts the result.

Color Dodge

Divides the background color by the inverted foreground color.

Add

Adds the two colors together.

Overlay

Applies Multiply blending if the foreground color’s lightness is below 0.5, or Screen blending if it’s above.

Soft Light

Like Overlay, but more subtle.

Linear Light

Applies Linear Burn blending (background + foregound - 1) if the foreground color’s lightness is below 0.5, or Linear Dodge (background + foreground) if it’s above.

Difference

For each component, subtracts the lower value from the higher value.

Exclusion

Adds the two colors, then subtracts their multiple twice.

Subtract

Subtracts the foreground color from the background color.

Divide

Divides the background color by the foreground color.

Hue

Combines the saturation and value of the background color with the hue of the foreground color.

Saturation

Combines the hue and value of the background color with the saturation of the foreground color.

Color

Combines the value of the background color with the hue and saturation of the foreground color.

Value

Combines the hue and saturation of the background color with the value of the foreground color.

Usar alfa

Whether to use the alpha channel of the foreground image during mixing. The alpha channel of the background image is always used.

Clamp/Clamp Result

Clamp the output value to the [0.0, 1.0] range.

Clamp Factor Shader Editor Geometry Node Editor

Clamp the Factor to the [0.0, 1.0] range.

Salidas

Image/Result/Color

The result of the mixing operation.

Ejemplos

Below are examples of blending modes, as well as some practical use cases.

../../../_images/compositing_types_color_mix_blend-modes.png

Blending a colored pattern with a flat color (top row) and a circular mask (bottom row).

Fixing overexposure

The Compositing setup below shows how to fix an overexposed render by darkening it and increasing contrast.

../../../_images/compositing_types_color_mix_contrast-enhancement.png

Example node setup showing two RGB Curves nodes and a Mix node for composition.

The top Nodo Curvas RVA darkens the image by linearly scaling each color value to a smaller one.

The bottom curve node increases constract by making small values smaller and large values larger.

Finally, the Mix node blends the two together.

Imágenes de Marca de Agua

In the old days, a pattern was pressed into the paper mush as it dried, creating a mark that identified who made the paper and where it came from. The mark was barely perceptible except in just the right light. Probably the first form of subliminal advertising.

Nowadays, people watermark their images to identify them as personal intellectual property, for subliminal advertising of the author or hosting service, or simply to track their image’s proliferation throughout the web.

Blender provides a complete set of tools for you to both encode your watermark and to tell if an image has your watermark.

Codificando su Marca de Agua en una Imagen

First, construct your own personal watermark. You can use your name, a word, or a shape or image not easily replicated. While neutral gray works best using the encoding method suggested, you are free to use other colors or patterns. It can be a single pixel or a whole gradient; it is up to you.

In the example below, we are encoding the watermark in a specific location in the image using the Translate node; this helps later because we only have to look at a specific location for the mark. We then use the RGB to BW node to convert the color image to grayscale numbers, which we then feed into the Map Range node to reduce the mark to one-tenth of its original intensity.

The Add node (Mix node with blending mode Add) adds the corresponding pixels, making the ones containing the mark ever-so-slightly brighter.

../../../_images/compositing_types_color_mix_watermark-encode.png

Embedding a watermark in an image.

Por supuesto, salvo que se deseara que la gente note la marca, no debería escalarse demasiado o ser hecha con un color contrastante. Hay también muchas otras formas, usando otras configuraciones de mezcla y equipos más elegantes.

Decodificando una imagen para su Marca de Agua

En caso de detectar una imagen que se suponga podría ser de autoría propia, será posible utilizar el árbol de nodos que se muestra a continuación para compararla con una imagen de archivo (esto es, una original, sin la marca de agua). En este árbol, el nodo Mezclar se establecerá en modo Diferencia y el nodo Mapear valor se usará para amplificar cualquier diferencia. Ahora se podrá comprobar cómo se destaca claramente la marca original.

../../../_images/compositing_types_color_mix_watermark-decode.png

Revisando una imagen para su marca de agua.