I just do the drawings in Paint 3D (which Microsoft no longer supports or updates). I will soon have to move to another simple drawing program. Long ago, I used to draw my diagrams by hand. Then when I wanted to begin to do the written part of a handout on a computer, I started scanning the diagrams in to be inserted in the word processing document. At first, I just cleaned up my scans a little in a simple drawing program on the computer. I eventually moved to doing the whole drawing on the computer. I have no fancy tablet, and I just draw things with the mouse. Occasionally when I want something to really look nice, I will tie the knot in cord, lay it directly on my scanner, and then pull the scan into my drawing program to get an accurate outline for my drawing. I find it easier to show tying details in my drawings compared to doing so in actually photos. Others with better lighting do well enough that way.
Since I have been looking at bends related to Bowlines and Quasi-Bowlines that work well with two ropes of different sizes (in another forum discussion), I had to try the eye knot in this discussion. Without the locking step, the most complicated part of this knot is the nipping structure. Thus, I tied the related bend with the small rope doing this nipping structure and the large rope having only a bight like a Sheet Bend. The resulting bend is diagramed below. It has many similarities to Ashley's Tucked Sheet Bend [#1436] and it would also work reasonably well as a "one-way" bend. It did not make sense to try to implement the locking step with the large rope in the bend. I did try reversing the two ropes, tying the nipping structure with the large rope and then adding the locking step with the small rope. This was pretty ugly, and I did not bother to draw it.