It is a pattern of the thick ray (radiation) that it is difficult to make it sober and it is saturated line tool of SAI and CLIP STUDIO. SAIやクリスタの集中線ツールだと地味に作りづらい、太い光線(放射線)のパターンです。

High resolution data for monochrome 2-value, transparent and 8000px×8000px. When a circle is drawn in the center, it becomes the pattern of the rising Sun flag.
The high-definition printing is not disturbed much though the center is moire though the one with a lot of lines is samune. But basically, it is recommended to use to hide something in the center.

モノクロ2値・透過・8000px×8000pxの高解像度データ。中心部に円を描くと、旭日旗状の模様になります。
線数が多いものはサムネだと中心がモアレていますが、高精細の印刷ではそれほど乱れません。ただ基本的には中心部をなにかで隠すような使い方を推奨します。
Thick Ray 6 species 太い光線6種