Finished effect:
I am opposed to step-by-step tutorials, so I try to make the tutorials as inspiring as possible, although it will be tiring for people who are eager for results.
First of all, fireworks need an explosion effect. At this time, we may think of [Radial Blur]; but after testing, [Radial Blur] has blur in both internal and external directions ~ and cannot produce a trailing effect. So consider using the [Polar Coordinates] filter that converts cones and planes.
Analyze the deformation rules of polar coordinate filters
Original picture a
b (after a uses [plane coordinates to polar coordinates])
c (a after using [polar coordinates to plane coordinates])
Indeed, it is possible to convert radial lines into parallel lines into one another. The original longitudinal parallel lines~ changed from plane to polar coordinates, and became the radiation lines we need. And both pictures b and c can be transformed back to the original picture a through back calculation.
Simulate fireworks with polar filters
It is known that b can be changed back to picture a through [polar coordinates to plane coordinates]; then we treat the picture x that needs to be processed as b; similarly to changing b back to a, change x into x1; and then add some vertical lines. Then use [plane coordinates to polar coordinates] to change this x1 back to x2 (similar to a to b). It can be seen that x2 is the effect of adding rays to x.
x
x1
x1 adds vertical line
x2
And we found that if we add a vertical line above the white line of x1, it will appear in the circle of x2 (the fireworks trail we want). If we add a vertical line below the white line of ) OK, let’s do a practical test:
Here, for the shape on x, we used a dynamic brush (set size jitter, spread, spacing, etc.) to draw a ring of random points. In the third picture, we used the [Filter-Stylize-Wind] filter to simulate the trailing effect of the flames (why did we have a black background and a white picture in the first place? Because [wind] blows bright colors).
Some friends may be wondering how the vertical [wind] blows. Of course, first rotate the canvas 90 degrees ~ and then rotate it back after blowing. (It’s best to test the difference between blowing to the left and right.):
In addition, the [wind] effect will definitely not be good once, and the "tail" is not long enough. So we usually blow 3 or 4 times.
Discussion of related issues
1. Careful friends may have noticed that the center of the radiation is the midpoint of the rectangular picture:
So we can produce different radiation effects by placing the pattern in different positions within the rectangle.
2. Can the white dots be larger? Answer: It’s best not to, because the effect after the wind blows is not like fireworks (it doesn’t feel like fine sparks, but lumpy explosives)
3. Can other effects be added?
Try it yourself: add some distortion filter effect after the wind blows
Finely crushed Mars effect
The trail blown by the wind does not have the feeling of tiny sparks, but the feeling of light (continuous)~~ What should I do? We use the [Add Noise] filter to solve it. (You can master the degree yourself)
Original picture
Add noise (monochrome mode)
After adding noise, immediately Ctrl+Shift+F
After adding noise, use the [Multiply] mode to fade out to avoid adding white noise to the original black part. And just adding black noise to the white trail will produce a "sparky" effect.
What to do with the light that is still burning? That is, those light points (excluding tails) need to glow or have some effects.
We should draw the light points on the transparent layer at the beginning and then duplicate it. Then the lower layer is merged onto the black background to make polar coordinates ~ as a tail. Keep the upper layer as is and add effects such as outer glow :
The basic methods have been explained. The specific steps need to be experienced by yourself.
Additional tips :
·If you want to make text fireworks, you can type first, then [Convert text to path], and then use the set brush to [Stroke path]. The subsequent process is the same.
·The completed fireworks are merged into a black background layer. Then copy this layer to the image you need. Set the blending mode of this layer to [Screen] and that's it. This allows multiple fireworks to be superimposed.
·After the fireworks are finished, you can use tools such as [Free Transformation] to process them into different shapes. In addition, the polar coordinates can also be used in reverse, which can produce a parabolic tail.
·Firework coloring: The lower layer (trailing layer) can be colored with Ctrl+U, or gradient mapping; the upper layer (light point layer) can be colored with layer style or Ctrl+U.