If the projected brows seem to fit one side but not the other, there can be a 4 reasons as to why.
In most cases, it is because your client's features or brow ridge are not perfectly symmetrical.
Since we are projecting symmetrical eyebrows by default, unless your client is perfectly symmetrical, the brows will not "land on the face" perfectly. After you have designed the brow shape and the client is happy with it, you can go into asymmetry mode and make as minimal changes as possible, to give the illusion of balance and symmetry as much as possible for your client.
Please watch this video for a detailed breakdown:
Reason 1 - The client is not facing directly forward towards the projector.
If you're mapping the brow to a rotated face position, this will result in brows mapped to the wrong angle. Ensure they are facing directly forward.
Reason 2 - The canvas is not aligned to the client's features.
Watch the "Align the Canvas" section of the Fleek Atlas Tutorial for clear and detailed steps to align the canvas to the client's facial features. Make sure your alignment is balanced between all facial features. This means making trade offs between:
Center between inner eye corners
Center of nose
Center of lips
Outer eye corners
Eye level
Reason 3 - Brow ridge topography is asymmetrical
Everyone has one side of their face where the brow ridge is more flat, compared to the other side which is more round. Some clients will have more extreme asymmetry than others. Use the ruler tool to instantly visualize the asymmetry and communicate the tradeoffs that will have to be made due to the asymmetry in the brow ridge topography.
Depending on your situation, you may want to:
shorten the front of the brow that's not fitting - shift the entire set of brows towards the flat side, then go into asymmetry mode and shorten the brow on the round side from the front of the brow
shorten the tail of the brow that's not fitting - go into asymmetry and shorten the length of the brow from the tail of the brow on the round side
Reason 4 - The client's features are asymmetrical
If a client has only minor asymmetries, you should map only in symmetry mode to give them symmetrical brows that fit their face well.
The more asymmetrical the client is, the more symmetrical eyebrows might look off on them. Your goals is to make as few changes as possible in asymmetry, to keep the brows as symmetrical as possible.
"How do I know what to change in asymmetry?"
Use all of the guiding lines to determine where is the appropriate place to make tradeoff. For example if on one side of the face the projected brow is going further out into the temple, is the outmost diagonal line lined up to the corner of their eye? If so is the opposite eye tilted or shorter than this eye? Is shortening that brow in asymmetry the correct tradeoff? When in doubt just test it to see and undo the change if it's not correct. Again the goal is to design brows that look good with as few changes in asymmetry as possible.