Bug summary

Half-filled triangular markers with edges have strange crown-like features at the top.

Code for reproduction

import matplotlib.pyplot as plt

fig, ax = plt.subplots()

ax.plot(
    0.5,
    0.5,
    linestyle="none",
    marker="^",
    markersize=50,
    markerfacecolor="tab:red",
    markerfacecoloralt="tab:blue",
    markeredgecolor="black",
    markeredgewidth=5,
    fillstyle="left",
)

plt.show()

Actual outcome

Expected outcome

There should be no little "crown" at the top.

Additional information

No response

Operating system

Manjaro

Matplotlib Version

3.8.4

Matplotlib Backend

QtAgg

Python version

Python 3.12.4

Jupyter version

4.0.11

Installation

conda