Distributions of the cosine of the angle between filament spines (fil) and the line of sight (los). For each sample, there are two plots. The left one is a bar plot of the quartiles of the distribution, where the black crossbar indicates the second quartile (the median). The right plot is a violin plot that shows the density curve of the distribution. The horizontal grey line indicates the median value for a uniform distribution. The closer the distribution gets to value 1, the more filaments are parallel to the line of sight (z-axis in other plots).