Why is the layer below PS not visible?

When PS fills the lower layer, the contents of the upper layer are invisible. The most common reason is that there is a mixed mode at the upper level.

As shown in the figure:

The detailed description of the mixed mode is as follows:

1, normal mode-this is the default mode of layer blending mode, which is commonly used. Do not mix with other layers. When used, lower colors are covered with the colors of pixels in the current layer.

Because color is regarded as light (not physical pigment) in PhotoShop, the subtraction attribute of color will not be used in the composite or color works formed in normal mode. For example, in normal mode, the 50% opaque blue selection above the 100% opaque red selection will produce lavender instead of the deep purple expected when mixing physical pigments. When the opacity of the blue selection increases, the generated color becomes bluer and less red, and blue becomes the color of the combined color until the opacity is 100%. Paint blue on the red area with 50% opacity with brush I, and the result is the same; The more you draw on the red area, the more the blue foreground color becomes the final color of the area. Therefore, in the normal mode, it is impossible to obtain a mixed color that is darker than the darkest color among the two mixed color components.

2. Dissolution mode-The pixel color generated by dissolution mode comes from a random replacement value of the upper and lower mixed colors, which is related to the opacity of the pixel. When the target layer image is superimposed on the bottom layer image in the form of scattered points, it will not have any influence on the color of the image. By adjusting the opacity, the density of scattered points in the target layer can be increased or decreased. The result is usually a grainy picture or a rough line edge. s4sR8D#fX|Kj,C

When the dissolution mode is defined as the mixing mode of layers, it will produce unpredictable results. Therefore, this mode is best used with the shadow application tool in Photoshop. The U 1ssQlve mode uses 100% opaque foreground color (or sampled pixels when used with the rubber stamp tool) to alternate with the underlying original color to create an effect similar to diffusion jitter. The lower the opacity of the color or image sample usually used in the "fusion" mode, the lower the frequency at which the color or proof is dispersed with the pixels of the original image. If the path is traced with opacity less than or equal to 50%, Dissolve mode creates a stripe around the edge of the image. This effect is very important to simulate the edge of damaged paper or the "splash" type of the original picture. 5ZF }w+{5_

3. Dimming mode-This mode is to compare the RGB values of two layers (i.e. the color brightness values in the RGB channels) when mixing the colors of pixels, and then take the lower value of the two layers to combine them into mixed colors, so that the gray level of the total color is reduced and the darkening effect is produced. Obviously, it is ineffective to synthesize images with white. Check the color information of each channel and the mixed pixel color, and select the darker one as the mixed result. Brighter pixels will be replaced by darker pixels, and the darker pixels will not change. F

~)Vb o \

In this mode, only tones on layers whose colors (or colors applied in dark mode) are darker than the background color are used. This mode removes colors brighter than the background color from the composite image.

4. Multiply mode-positive superposition mode. The color information in each channel is investigated, and the background color is positively superimposed. Its principle is the same as the "subtractive principle" in color mode. The color produced by this mixture is always darker than the original color. If there is a positive overlap with black, only black is produced. And mixing it with white won't have any effect on the original color. Multiply the gray levels of the upper and lower pixel colors to get the color with lower gray level, which becomes the composite color. The effect of layer composition is simply that pixels with low gray level appear and pixels with high gray level do not appear (that is, dark color appears and light color does not appear), resulting in an effect similar to positive film superposition. (Note: the black gray scale is 0, and the white gray scale is 255)

? This pattern can be used for coloring and as a pattern for image layers. Multi-mode subtracts the brightness value of the source material from the background image (whether it is colored or placed on the layer) to obtain the final composite pixel color. Applying lighter colors in multi-mode has no effect on the final pixel color of the image. Multi-mode is very popular to simulate shadows. Shadows in reality never depict a brighter color or hue than the source material (shadow) or the background (the area where the shadow is obtained). In this chapter, users will use multiple modes to add drop-down shadows to Lee in the restored image.

5. Color deepening mode-When using this mode, the color value of the layer will be darkened, and the brighter the added color, the more delicate the effect will be. Darkening the color of the bottom layer is similar to positive overlay, but the difference is that the contrast of the bottom layer will be increased according to the superimposed pixel color. Mixing with white has no effect.

The effect of this color deepening mode is similar to that of multi-mode creation, except that the brighter areas on the background disappear and the image areas show clear edge features.

6. Linear deepening mode-Similar to positive superposition, the background color is darkened by reducing brightness to reflect the mixed color. Mixing with white has no effect.

7. Lighten mode)—— Contrary to the dimming mode, the brightness mixing mode is to compare the RGB values of two pixels, and select the high value to become a mixed color, so the total color gray level rises, resulting in a brightness enhancement effect. The image synthesized with black has no effect, but it is still white when it is white. Brightening mode. Contrary to the dimming mode, the brightness of pixels mixed with each other is compared, and the brighter pixels in the mixed color are selected to keep and replace other darker pixels. # oz

a\ Ee

In this mode, which is opposite to the darkening mode, brighter color areas dominate the composite image. Dark areas on the layer or colors used in Brighten mode do not appear in the composite image.

8. Screen mode (also called color filter, screen mode)-the opposite of positive overlay mode. The effect of the composite layer is to display the higher gray level in the two layers, while the lower gray level does not appear (that is, light color appears and dark color does not appear), resulting in bleaching effect. Resulting in a brighter image. According to the principle of color mixing in additive mode. That is, for screen mode, colors have an additive effect. For example, when red, green and blue are all maximum values of 255, mixing in screen mode will produce white with RGB values of (255, 255, 255). On the contrary, black means 0. Therefore, mixing with black has no effect in this mode, while mixing with white will produce white with the largest RGB color (RGB values are 255,255,255).

"Screen mode is the anti-mode of multi-mode. Whether you use the color tool in screen mode or specify a layer for screen mode, the result of merging the source image with the background is always the same composite color or lighter color. This screen mode is very useful for creating neon glow effects in images. If you draw white (or any light color) around the edge of the background object on the layer, and then specify the layer screen mode, you can get a full or sparse halo effect by adjusting the opacity setting of the layer.

9. Color dodge mode-When using this mode, the color value of the layer will be highlighted, and the deeper the added color, the more delicate the effect will be. Contrary to color deepening, mixed colors are reflected by lowering the contrast and highlighting the base color. Mixing with black has no effect. Wiener; I _

Color Fade mode is similar to Screen mode, except that the edge area of the layer is clearer in this mode and the strokes in this mode are colored. In addition, whenever the color shading mode is defined as mixing foreground and background pixels, the dark areas on the background image will disappear.

10, Linear Fading Mode-Linear Color Fading Mode. Similar to the color gradient mode. The bottom color is brightened by increasing brightness, thus obtaining mixed color. Mixing with black has no effect.

1 1, superposition mode-When merging images with this mode, the method of multiplication and screen mode is combined. That is, according to the color of the bottom layer, it is decided which pixels of the target layer are synthesized in multiplication mode and which pixels are synthesized in screen mode. After synthesis, some areas become dark and some areas become bright. Generally speaking, the change is the middle tone, and the high color and dark color areas are basically unchanged. Whether pixels are mixed by multiplication (positive superposition) or screen (screen) depends on the underlying color. Colors will be blended, but the brightness details of highlights and shadows of the base color will be preserved.

This mode mixes the color placed or applied on the layer with the background color in an artistic and logical way, but it can get interesting results. Pure black or pure white areas in the background image cannot display superimposed colors or image areas on the layer in overlay mode. The brightness value between black and white on the background area is mixed with the color of 0ver 1ay material to produce the final composite color. In order to make the background image look like it was taken with the design or text, you can draw the design or text by superimposing it on the background image.

12, soft light mode (soft light mode)-the effect is like a layer of soft light, so we call it soft light. When moving, the upper layer image is applied to the lower layer in a soft light way. When the bottom gray level tends to be high or low, the tone of the layer synthesis result will be adjusted to tend to the middle gray level, and a softer color synthesis effect will be obtained. As a result, the middle bright tone region of the image becomes brighter, the dark color region becomes darker, and the contrast of the image increases, similar to the effect of illuminating the image with soft light. Whether the color of the picture is dark or bright depends on the color information of the upper layer. The effect is similar to placing a scattered spotlight on the image. If the brightness of the upper color (light source) is higher than 50% gray, the bottom layer will be illuminated (faded). If the brightness of the upper color (light source) is less than 50% gray, the bottom layer will darken as if it were burnt. If mixed directly with black or white, it can produce obvious darkening or brightening effect, but it will not make the covered area produce pure black or pure white.

Soft light mode uses color to darken or brighten the background image according to the hue of the background color. For example, if the background image is painted with 50% black, which is a gradient from black to white, the darker areas in the gradient will become darker, while the brighter areas will appear brighter when colored.

13, strong light mode-the effect is like painting a layer of strong light, so it is called strong light. Therefore, if the gray scale of the two layers of colors is biased towards low gray scale, the effect is similar to the positive superposition mode, and when it is biased towards high gray scale, it is similar to the screen mode. The alto effect is not obvious. Depending on the color of the upper layer, the positive film is stacked on the bottom layer or the screen and the bottom layer are mixed together. This effect is like shining strong light on an image. If the brightness of the upper color (light source) is higher than 50% gray, the image will be illuminated, and the blending mode is similar to the screen. On the contrary, if the brightness is lower than 50% gray scale, the image will be darkened, and the blending mode is similar to Multiply (positive overlay mode). This mode can add shadows to the image. If it is mixed with pure black or pure white, it is also pure black or pure white.

This mode is essentially the same as the soft stone mode except that the background color is multiple colors or masked according to the colors in the background. Its effect is stronger than soft light mode. Like superposition, this model can also simulate patterns or characters on the surface of background objects.

14, strong light mode (vivid light mode)-Adjust the color with darker or lighter contrast, depending on the color distribution in the above picture. If the brightness of the upper color (light source) is higher than 50% gray level, the image will reduce the contrast and become brighter; If the brightness of the upper color (light source) is lower than 50% gray, the contrast of the image will be enhanced and darkened.

15, linear light mode-If the brightness of the upper color (light source) is higher than that of neutral gray (50% gray), increase the brightness to brighten the picture, otherwise decrease the brightness to darken the picture.

16, fixed light mode (point light, needle light mode)-Replaces colors according to upper color distribution information. If the brightness of the upper color (light source) is higher than 50% gray, the pixels darker than the upper color will be replaced, while the brighter pixels will not change. If the brightness of the upper color (light source) is less than 50% gray, the pixels brighter than the upper color will be replaced, while the darker pixels will not change.

17, solid color blending (strong blending mode, hard blending mode)-Photoshop CS has added a new blending mode called "solid color". When this mode is selected, the color of this layer image will be mixed with the color of the next layer image. Usually, when two layers are mixed, the result is brighter bright color and darker dark color. Reduce fill opacity and establish multi-tone separations or thresholds. The solid color blending mode is uncertain about the image itself. For example, when it sharpens the image, the filling opacity will control the sharpening intensity. "

The brand-new "solid color" mixing mode produces a poster-like mixing effect, and the multi-tone color separation picture is completed. The mixing result consists of eight colors: red, green, blue, cyan, magenta, yellow, black and white. The mixed color is determined by the brightness of the base color and the mixed layer (the mixed color is the product of the brightness of the base color and the mixed color).

1. Determine the specific tone by adjusting the layer M:AO.

3. Determine the approximate threshold contour by adjusting or editing the gray level.

3. Determine the distribution of different tones by adjusting the color of the original image (it is recommended to adjust different channels with curves).

18, Difference (difference mode) —— When acting, compare the RGB values on both sides of the layer to be mixed, and subtract the high value from the low value as the composite color. Therefore, this mode is often used. For example, when an image is usually combined with a white layer, an inverted image with negative effects can be obtained. According to the brightness distribution of the upper and lower colors, the color values of the upper and lower pixels are subtracted. For example, using the maximum white to do the difference operation will get the opposite effect (subtracting the lower color to get the complementary value), while using black will not change anything (black has the lowest brightness, and the lower color subtracts the minimum color value of 0, and the result is the same as the original).

It is best to use halftone or halftone coloring on the layer for the difference mode. This mode creates a color opposite to the background color. For example, in the difference mode, when blue is applied to a green background, a cyan-green combined color will be produced. This mode is suitable for simulating the original design negatives, especially for generating excellent effects in images where the background color changes from one area to another.

19. Exclusion mode-Exclusion: Similar to the poor effect, there is no difference in synthesizing an image with higher or lower order colors, and the effect is different when using colors close to the middle tone. Generally, the effect is softer than the poor. Exclusion mode. Similar to Difference, but with lower contrast. Similarly, when mixed with pure white, the opposite effect is obtained, while when mixed with pure black, there is no change.

This mode produces softer and brighter effects than the d 1 difference mode. Both difference and exclusion modes can make human or natural scenery images produce more realistic or attractive image synthesis.

20. hue mode-When synthesizing, the hue value of the lower image is replaced by the hue value of the current layer, while the saturation and brightness remain unchanged. The parameters that determine the generated color include the lightness and saturation of the bottom color and the hue of the top color.

In this mode, the color value or color of the layer will replace the color of the underlying background image. When using this mode, it is helpful to consider the hue, saturation and brightness (HSB) color modes. Tone mode replaces the basic color components without affecting the saturation or brightness of the background image.

2 1, saturation mode-When synthesizing, the saturation of the lower layer image is replaced by that of the current layer, while the hue value and brightness remain unchanged. Saturation mode. The parameters that determine the generated color include the brightness and hue of the bottom color and the saturation of the top color. In this mode, mixing with the color with saturation of 0 (gray) will not produce any change. -l/~to/j-ke-s2gd

This mode uses the intensity (color purity) of the color on the layer (or the color using the coloring tool) and emphasizes the color on the background image according to the color intensity. For example, when pure blue is applied to a gloomy background image, the original solid color in the background will appear, but blue will not be added to the composite image. If neutral color is selected (color that does not display mainstream chromaticity), the background image will not change. Saturation mode can be used to display the base color whose color intensity darkens with time in an image.

22, Color mode (color mode)-the above two modes are available, with the tone value and saturation of the current layer replacing the tone value and saturation of the lower image, while the brightness remains unchanged. The parameters that determine the generated color include brightness of the bottom color, hue and saturation of the top color. This mode can preserve the gray details of the original image. This mode can be used for coloring black-and-white or unsaturated images.

23. lightness mode)- When two layers are combined, the brightness value of the image below is replaced by the brightness value of the current layer, while the hue value and saturation remain unchanged. Parameters that determine the generated color include hue and saturation of the bottom color and brightness of the top color. The effect of this mode is just the opposite of the color mode, and it is mixed with the lower color according to the lightness distribution of the upper color.