Add Blendmode Workaround
I discovered a neat little trick when using the ‘add’ blendmode. Normally, the lighter the background, the less visible it is, and using it on a white background will make it invisible. There’s a nice little trick I found to work around this.
All you do is apply a ‘drop shadow’ filter to the movieclip, and set the quality to low, and blur, strength, and distance to 0. This in effect will render no drop shadow, but you will see your movieclip without any loss in visibility.
This will be especially useful in things like, oh I don’t know, particle effects?