For each Julia set in this week's images I'm sharing the original color-gradient fractal, followed by three results applying similar sets of effects.
Here's a spiral Julia set with C = -0.63 + 0.4i, max iterations 500:
Adding vibrancy and posterize effects with MathPaint:
Here's the output of a Morphology Maximum blur, Edges, and Exposure Adjustment effects on the original:
The final example uses a Whitepoint Adjust effect to shift the original image colors (along with Brightness/Saturation/Contrast), then applies a Fourfold Rotated Tile effect:
