Here's some examples of what I have. I stitched the hell out of my pieces and did a few modifications. I tried the shoe goo approach at first, but I felt it was really tacky and I did a poor job. I used several different items for garnish (dyed jute thread, stalk grass, and stuff I bought from Tactical Concealment) So after 2 years, this is my second ghillie build:
I cut a hole on the top of the boonie, stitched some mesh and lined with some taping clothing, attached to top of boonie to allow more breathability. I used some woodland clothe stitched to the boonie along with some netting to extend the veil out. Netting stitched to the boonie.
Normal BDU pants with canvas covering on the legs. Added some quilted padding underneath. Netting stitched to the backside.
The BDU jacket is what took me the longest and where I did the most mods. Cut a vent hole on the back, replaced with mesh. I removed the pockets on the chest and put them along the arms. I put canvas on the chest and elbows with padding underneath. Added a zipper for quick donning and doffing. Added thumbloops on the sleeves.