Slide variables. X-axis aligned triangle filler. This filler is mostly for translucent triangles, which is possible through translucent pen. Using an x-axis filler allows non-overlapping lines so there are no places more opaque. However, at high resolution you can see some overlapping from the outlines when the resolution is set to a high number.
I give main credit to @TheLogFather for the idea and format for this tri-filler.
