In ps, the effect of this flash is:
1. Create a new white background file and "Edit-Fill" to fill the appropriate color background layer;
2. Create a new layer, open the "Brush Tool", set the foreground color to white, and use the "soft-edged circular brush" to stipple at the appropriate place;
3. "Filter-Blur-Radial Blur-Zoom";
4. Create a new layer, use "Sample Brush 4 Brush" to draw on the white point, rotate the brush, and draw again.