I will explain special effect backgrounds that can be easily created with key frames using Clip Studio Paint EX.

At first

First of all, I will explain roughly by creating a basic mount 1920 x 1080 px 350 dpi second + frame setting.

[1] Create a background

(A) Pink (B) Yellow (C) Central pillar white 3 gradation images, (D) White aurora image stretched to radiation, (E) Dust 1 (F) Dust 2 of sprayed image, Cloud pattern image Prepare one (G) core of , referring to the image. *The background of (D, E, F) is pink so that the content of the drawing is easy to understand.

[2] Assemble layers

Create another "(G-2) core 2 drawing" by rotating the "(G) core drawing" created earlier 90 degrees clockwise. Arrange them while setting the layer effect in order from the top. (D) Aurora / Addition (luminescence 30%), (E F) Dust / Addition (luminescence), (G) Core 1 / Addition (luminescence), (G-2) Core 2 / Addition (luminescence), (C・Assemble B, A) Background/100% Normal, in order, as shown in the photo.

[3] Move with keyframes

Create a new timeline and set it to 13 seconds frame. The start and end settings are important, so decide them. This time, the start frame is 0 seconds + 1 frame, and the end frame is 13 seconds + 12 frames.

Keyframe movement (ABC) background fixed. (D) Aurora rotates, (E F) Dust rotates and expands. (G) Only core 1 is made by assembling keyframes first. Set the opacity to start from 0% and repeat 100% in 1 second, so that it rotates almost once (359 degrees) in 13 seconds. After assembling, duplicate (G-2) Core 2, and intentionally shift (G) Core 1 to the movement followed by (G-2) Core 2 so that it starts at the 12th frame of (G).

(E・F) Since the initial movement of the dust is slow, the frame is advanced after accelerating. The expansion speed of (E) dust (small particles) is slow, and the expansion speed of (F) dust (large particles) should be moved faster to create a sense of depth.

Looking at the layer frame, the end is a trajectory like the image.

When completed, it will be the background of 13 seconds. I think it will be more effective if you add characters here.

During the production process, it is very important to make it while reviewing it many times so that it will be exactly as you imagined it. Have a good creative life.