hook.Add("CalcView", "dynamic znear", function(ply, pos, ang, fov, znear, zfar)
    local d = util.TraceLine(
        {
            start = pos,
            endpos = pos + ang:Forward() * 20,
            filter = ply
        }
    )

    fov = -(fov / 180) + 1

    local z = d.Fraction * fov
    z = z * 20

    if z < 1 then
        z = znear
    end

    return
    {
        znear = z
    }
end)