The third update of FBS is an ability to upload your own SVG charges. Careful, there might be bugs - vector graphics are fickle. It's recommended to have one shape, without overlays. Border width doesn't count (if you want contour, transform lines to objects).

There are some premade shapes too, like 50 stars of USA or Canadian maple leaf.

Added layers now has option of transparency.

You can join the Discord to discuss FBS: https://discord.gg/StwnxP6

In the second update we get the ability to add layers to the flags. The stack of layers is displayed at the left edge of the screen.

Every layer has the same interface as the base layer, and also scale (in percents) and position inputs. Layer can be placed in three positions along each axis. The default position is the left top corner, as a canton.

You can join the Discord to discuss FBS: https://discord.gg/StwnxP6