So, just to get this correct, when the line intersects at a grid resolution of 0 there is no speedup and we have to calculate everything. But when we increase the amount of grids, we can then look through less pixels than what was needed? So the main purpose of the grid is finding intersections faster
for ray tracing acceleration?

So, just to get this correct, when the line intersects at a grid resolution of 0 there is no speedup and we have to calculate everything. But when we increase the amount of grids, we can then look through less pixels than what was needed? So the main purpose of the grid is finding intersections faster for ray tracing acceleration?