[PIXEL SNAP with 8x8 grid and 8x8 brush]

Hey Im using Affinity Photo and I'm doing some pixel art.

I'm using a brush that is 8x8 pixels. My grid spacing is 8x8 Pixels with no subdivisions.

I was wondering if there is a way snap to grid but have the brush jump from grid square to grid square.

 

So now I want the bursh just to snap to each indidvidual 8x8 grid space so every time i click its going to fill an 8X8 square within the bounderies of the grid. So my 8x8 brush always lines up with the grid.

If i hold down shift and click on three points I want it to comes out like the image on the left. 

But right now I am getting the result on the right.

I've played with the snapping setting but I can't quite figure it out.

If anybody knows how to set this up please let me know. Thx