Scene synthesis, what’s wrong with the photos I synthesized – Photo synthesis

In this era of rampant special effects, if you don’t know Photoshop, you’d be embarrassed to tell people you know how to design, and if you don’t know synthesis, you’d be embarrassed to tell people you know how to use Photoshop, right? Looking at the heaven-defying pictures synthesized by various masters on the Internet, do you always wonder: How did they do it? Why do my composite pictures always look weird?

For example, in the above work, the creative appeal is: don’t live in the eyes of others. The design is to make the home into the shape of an eye, and then put a very good-looking man with a scary expression in the “eyeball”. The idea is a bit new. As for the execution, does it feel weird?

It’s really weird. Even an old lady can probably tell that this kind of picture is fake. Composite pictures focus on confusing the real with the fake. Although it’s fake, it looks the same as the real one. If your composite picture looks real, it’s fake. , probably because the following aspects are not handled well enough.

1. The picture is not cut out properly.

Cutting out images is a very basic task, but it is also a critical step in compositing, so it cannot be neglected easily. The most basic requirement is to retain as much detail as possible without leaving any white edges. For example, the hair of the character in the picture below looks like a quilt. It looks the same as what was cut with scissors, which is very unrealistic. When you zoom in, there are still some white edges on the character’s body, which seriously affects the character’s integration into the overall environment.

It’s actually very simple to cut out the picture well. First, you need to get rid of the magic wand tool and use the pen tool to cut out all the details as much as possible. Second, when cutting out the picture, move the pen path slightly inwards so that there will be no white spots. Side. For images that are more difficult to cut out, such as hair, the general approach is to use channels and the background eraser tool. For specific methods, you can go to Baidu to find tutorials. After all, this is not an article specifically about cutting out images. I won’t go into details.

2. The clarity of elements is not uniform

The lens effect of this picture is a large depth of field, so the clarity of all elements in the picture should be similar. When some elements with a large difference in clarity or shot with a small depth of field effect are added, it will appear very abrupt.

The carpet in the picture above is obviously much blurrier than other elements. It is probably the result of forcibly enlarging the material with insufficient pixels. Also, the vase on the left was shot with a small depth of field effect. The mouth of the bottle is still very clear, but the bottom of the bottle is already very clear. Blurred, these do not match the characteristics of photos taken with the same lens, so they need to be replaced with overall clearer elements.

3. The structure of the elements is not suitable for splicing together

When we want to use some elements to synthesize a specific shape, it is also important whether each element conforms to the characteristics of the shape. If the structure is not suitable, the overall effect will not look harmonious. For example, there is a square cabinet in the left cornerIt seems inappropriate to put a square sofa in a round living room. What structural elements should be selected to fully integrate into the overall environment and achieve the design purpose is a question we need to think about.

In order to better fit the characteristics of this “eye” outline, I replaced the square cabinet on the left with a fan-shaped one, and then replaced the hard sofa with a circular sofa. The overall feeling is much more harmonious. Is there any absolute advanced customization? ?

4.Perspective is not uniform

Many designers are not very sure about perspective when designing. It is recommended to learn about perspective and then establish perspective auxiliary lines when designing. The elements in a space follow the same perspective. Elements found from different places should be as close to this perspective as possible, otherwise they will look fake. The perspective depends on the shooting angle. The shooting angle of this picture is a frontal view. The horizontal line is located in the exact center of the picture. So the rough perspective is as follows:

As can be seen from the picture above: In the original picture, the small cabinet on the left, the window in the lower left corner, the sofa, the door in the lower right corner, the flowers on the right, etc. do not conform to the overall perspective, so this is why the whole picture looks weird. one. The perspective of some elements can be adjusted in post-production, such as square cabinets, tables, etc., while some are difficult, such as characters, and can only be shot again and the materials changed.

5. Lack of interaction between elements.

Since they are in the same space, there must be connections between each element, such as before and after, interspersions, mutual state effects, projections on connected objects, environmental colors, etc., such as a person standing in the grass. Part of your feet will definitely be submerged by the grass; a boat driving in the water will stir up waves or ripples. Interaction between elements will make it more real and holistic.

Therefore, in this work, I added some environmental colors, and also deliberately changed the size or position of some elements. For example, I made the character larger so that its hands, feet, and back could touch the surrounding walls as much as possible. To show the feeling of being trapped rather than just curled up in the center of the room; I darkened the color of the character, especially the part against the left wall, so that the character “sinks” instead of floating; and I moved the position of the sofa, The purpose of making it overlap with the character’s legs, etc., is to strengthen the interaction between elements.

6. The direction of light is not uniform

As can be seen from the picture above, the lighting directions of the sofa and the entire picture are inconsistent. The light of the sofa comes from directly above, while the light of the wall comes from the upper left. When the directions of the light are not uniform, It is equivalent to telling others clearly that these are elements that are not in the same environment.

The correct approach is to shoot all the materials under the same light source. If you are looking for materials online, try to find the lighting direction is similar. Of course, there are also some good materials in all aspects, but there is a problem with the direction of the light. We can change the direction of the light through post-retouching. For example, the light direction of the sofa in the picture above was changed from directly above to the upper left. horn.

PS: Changing the direction of light means changing the light-receiving surface, backlight surface, and projection direction.

7. The projection is too fake

For objects placed on the ground, the effect of projection determines whether they can blend into the environment. I found that the main reason why most composite images look strange is poor projection. First of all, the trend and position of the projection must be clarified. The position of the outer contour projection in the picture below is wrong. The starting point of the projection should be at the intersection of the wall and the ground, not at the top of the wall.

For this kind of structure that you are not familiar with, you can find a real object or model, simulate the light and shadow you need, and then observe its projection. For example, the following model was made by me, who is very ingenious.

Secondly, the projection of the character does not change at all and appears very flat. The real projection is not like this at all. It will change depending on the specific height of the object from the ground and other objects covered by the projection. For example, the right leg of the character in the picture is close to the ground. The projection here will be close to the leg and the color is relatively heavy. The knee of the left leg is resting on the right leg, so the distance between the projection here and the left knee is It will also be larger, and the blur will be more severe.

Also, the back of the character is against the wall, so the projection of the person will not only appear on the ground, but also on the wall. The trend of the projection on the vertical wall will be different from that on the horizontal ground. The projection here will Go up the wall.

8. The environmental color is not uniform

Environmental color refers to the color of the environment under the illumination of various light sources (sunlight, moonlight, lights). In fact, the influence of an object on the color of other objects in a space is also the environmental color. In the picture below, it is obvious that the overall environment color is yellow, but the color of the character’s environment does tend to be cyan (but no one told you that it is unlucky to be blue in the hall?), which makes the character somewhat out of place, so the character’s environment color needs to be changed to Yellow; secondly, the character is wearing bright red clothes, which should cast a little red color on the wall next to it. Showing these details will make it more realistic.

After making adjustments in these aspects, the picture is much better than before. It can be said that it is fake but very real. The final effect is as follows:

www.16xx8.com

Compositing is not a skill that can be mastered by just using simple PS and cutting out pictures, but it is not as difficult as imagined. There is a method for everything. If you want to practice compositing well, in addition to doing more exercises, observing more things, and learning certain sketching knowledge In addition, the most important thing is to be patient and don’t flinch when encountering complex designs. Challenging some seemingly impossible tasks will give you unexpected gains.

In this era of rampant special effects, if you don’t know Photoshop, you’d be embarrassed to tell people you know how to design, and if you don’t know synthesis, you’d be embarrassed to tell people you know how to use Photoshop, right? Looking at the heaven-defying pictures synthesized by various masters on the Internet, do you always wonder: How did they do it? Why do my composite pictures always look weird?

For example, in the above work, the creative appeal is: don’t live in the eyes of others. The design is to make the home into the shape of an eye, and then put a very good-looking man with a scary expression in the “eyeball”. The idea is a bit new. As for the execution, does it feel weird?

It’s really weird. Even an old lady can probably tell that this kind of picture is fake. Composite pictures focus on confusing the real with the fake. Although it’s fake, it looks the same as the real one. If your composite picture looks real, it’s fake. , probably because the following aspects are not handled well enough.

1. The picture is not cut out properly.

Cutting out images is a very basic task, but it is also a critical step in compositing, so it cannot be neglected easily. The most basic requirement is to retain as much detail as possible without leaving any white edges. For example, the hair of the character in the picture below looks like a quilt. It looks the same as what was cut with scissors, which is very unrealistic. When you zoom in, there are still some white edges on the character’s body, which seriously affects the character’s integration into the overall environment.

It’s actually very simple to cut out the picture well. First, you need to get rid of the magic wand tool and use the pen tool to cut out all the details as much as possible. Second, when cutting out the picture, move the pen path slightly inwards so that there will be no white spots. Side. For images that are more difficult to cut out, such as hair, the general approach is to use channels and the background eraser tool. For specific methods, you can go to Baidu to find tutorials. After all, this is not an article specifically about cutting out images. I won’t go into details.

2. The clarity of elements is not uniform

The lens effect of this picture is a large depth of field, so the clarity of all elements in the picture should be similar. When some elements with a large difference in clarity or shot with a small depth of field effect are added, it will appear very abrupt.

The carpet in the picture above is obviously much blurrier than other elements. It is probably the result of forcibly enlarging the material with insufficient pixels. Also, the vase on the left was shot with a small depth of field effect. The mouth of the bottle is still very clear, but the bottom of the bottle is already very clear. Blurred, these do not match the characteristics of photos taken with the same lens, so they need to be replaced with overall clearer elements.

3. The structure of the elements is not suitable for splicing together

When we want to use some elements to synthesize a specific shape, it is also important whether each element conforms to the characteristics of the shape. If the structure is not suitable, the overall effect will not look harmonious. For example, a square cabinet in the left corner or a square sofa in a round living room are inappropriate. We need to think about what structural elements to choose to fully integrate into the overall environment and achieve the design purpose. The problem.

In order to better match the characteristics of this “eye” outline, I replaced the square cabinet on the left with a fan-shaped one, and then replaced the hard cabinet with a fan-shaped one.The �� sofa has been replaced by a circular sofa, and the overall feeling is much more harmonious. Is there absolute advanced customization?

4.Perspective is not uniform

Many designers are not very sure about perspective when designing. It is recommended to learn about perspective and then establish perspective auxiliary lines when designing. The elements in a space follow the same perspective. Elements found from different places should be as close to this perspective as possible, otherwise they will look fake. The perspective depends on the shooting angle. The shooting angle of this picture is a frontal view. The horizontal line is located in the exact center of the picture. So the rough perspective is as follows:

As can be seen from the picture above: In the original picture, the small cabinet on the left, the window in the lower left corner, the sofa, the door in the lower right corner, the flowers on the right, etc. do not conform to the overall perspective, so this is why the whole picture looks weird. one. The perspective of some elements can be adjusted in post-production, such as square cabinets, tables, etc., while some are difficult, such as characters, and can only be shot again and the materials changed.

5. Lack of interaction between elements.

Since they are in the same space, there must be connections between each element, such as before and after, interspersions, mutual state effects, projections on connected objects, environmental colors, etc., such as a person standing in the grass. Part of your feet will definitely be submerged by the grass; a boat driving in the water will stir up waves or ripples. Interaction between elements will make it more real and holistic.

Therefore, in this work, I added some environmental colors, and also deliberately changed the size or position of some elements. For example, I made the character larger so that its hands, feet, and back could touch the surrounding walls as much as possible. To show the feeling of being trapped rather than just curled up in the center of the room; I darkened the color of the character, especially the part against the left wall, so that the character “sinks” instead of floating; and I moved the position of the sofa, The purpose of making it overlap with the character’s legs, etc., is to strengthen the interaction between elements.

6. The direction of light is not uniform

As can be seen from the picture above, the lighting directions of the sofa and the entire picture are inconsistent. The light of the sofa comes from directly above, while the light of the wall comes from the upper left. When the directions of the light are not uniform, It is equivalent to telling others clearly that these are elements that are not in the same environment.

The correct approach is to shoot all the materials under the same light source. If you are looking for materials online, try to find the lighting direction is similar. Of course, there are also some good materials in all aspects, but there is a problem with the direction of the light. We can change the direction of the light through post-retouching. For example, the light direction of the sofa in the picture above was changed from directly above to the upper left. horn.

PS: Changing the direction of light means changing the light-receiving surface, backlight surface, and projection direction.

7. The projection is too fake

For objects placed on the ground, the effect of projection determines whether they can blend into the environment. I found that the main reason why most composite images look strange is poor projection. First of all, the trend and position of the projection must be clarified. The position of the outer contour projection in the picture below is wrong. The starting point of the projection should be at the intersection of the wall and the ground, not at the top of the wall.

For this kind of structure that you are not familiar with, you can find a real object or model, simulate the light and shadow you need, and then observe its projection. For example, the following model was made by me, who is very ingenious.

Secondly, the projection of the character does not change at all and appears very flat. The real projection is not like this at all. It will change depending on the specific height of the object from the ground and other objects covered by the projection. For example, the right leg of the character in the picture is close to the ground. The projection here will be close to the leg and the color is relatively heavy. The knee of the left leg is resting on the right leg, so the distance between the projection here and the left knee is It will also be larger, and the blur will be more severe.

Also, the back of the character is against the wall, so the projection of the person will not only appear on the ground, but also on the wall. The trend of the projection on the vertical wall will be different from that on the horizontal ground. The projection here will Go up the wall.

8. The environmental color is not uniform

Environmental color refers to the color of the environment under the illumination of various light sources (sunlight, moonlight, lights). In fact, the influence of an object on the color of other objects in a space is also the environmental color. In the picture below, it is obvious that the overall environment color is yellow, but the color of the character’s environment does tend to be cyan (but no one told you that it is unlucky to be blue in the hall?), which makes the character somewhat out of place, so the character’s environment color needs to be changed to Yellow; secondly, the character is wearing bright red clothes, which should cast a little red color on the wall next to it. Showing these details will make it more realistic.

After making adjustments in these aspects, the picture is much better than before. It can be said that it is fake but very real. The final effect is as follows:

www.16xx8.com

Compositing is not a skill that can be mastered by just using simple PS and cutting out pictures, but it is not as difficult as imagined. There is a method for everything. If you want to practice compositing well, in addition to doing more exercises, observing more things, and learning certain sketching knowledge In addition, the most important thing is to be patient and don’t flinch when encountering complex designs. Challenging some seemingly impossible tasks will give you unexpected gains.