Dinamic gradient tool

I somehow did this with the dynamic gradient brush and i can recreate it, can someone help me

did you mess with the opacity perhaps?

I dont think so, all i remember doing is clicking gradient on the dynamic bar and then my brush turned to a clear circle where i could shade in from the black to white

did you turn on the shader ink perhaps?

Shader ink?

its a pretty powerful feature, if you come here
image
and click in the shading ink, then proceed to select a range in your color palette, it will lock into those colors and using right and left click you can shade your sprite.