getCellsWithinRadius

local center = cellsize / 2

function align(x)
    return math.floor(x + 0.5) + center
end

function getCellsWithinRadius(Point, Radius)
    local Point = Point * cellsize
    local HalfRadius = (Radius * cellsize) / 2
    local near = {}

    for x = Point.X - HalfRadius, Point.X + HalfRadius do
        local fx = align(x)
        for y = Point.Y - HalfRadius, Point.Y + HalfRadius do
            local fy = align(y)
            for z = Point.Z - HalfRadius, Point.Z + HalfRadius do

                local v3p = Vector3.new(fx, fy, align(z))
                if ((Point - v3p).magnitude < Radius) then
                    table.insert(near, v3p)
                end
            end
        end
    end

    return near
end