step 1: make a white circle, i used the penile tool at size 107
step 2: use the soft eraser and make the brush size slightly smaller then the pencil size, i used size 100. then click in the center of your circle and continue to click the middle to get a fairly translucent center with an opaque outer edge
step 3: use the soft eraser to add shading by making a ) shape make sure to connect it to the center and to erase slightly on the edge but make sure there is still some definition on the edge. DO NOT ERASE ALL THE WAY THROUGH!
step 4: put alpha lock on and use the blur icon to blend is the harsher lines (clearly seen in step 2) this give it a more smooth appearance
step 5: on a new layer use the air brush tool to add shine
step 6: you are done, but you can color your bubble/water drop by using the alpha lock
you can put these on any background and have it show through making it seem more bubble like, such as in this example:
