StardustLarva's Visual Explorations

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It easy to represent bug from the top view because it symmetrical but you should try to draw them from different angle to stay out of the comfort zone.

Drawing from imagination combine 2 principle perspective and 3d form if you can draw a line, wave, ellipse and cercle you can draw any thing you want by simply reducing what you see into major form and adding on top of it with mixed form

I would recommend using this link
http://www.ctrlpaint.com/library

Study the section
2) Traditional Drawing
3) Drawing 2
7) Perspective