Tiles scroll down with some speed (600 px\sec)
Speed = 600
Every 200/Speed ms i create object:
height 200, width 128
X = floor(random(1,9)* 128)
Y = - 200
Every Tick i Set Y to Tiles.Y + Speed *dt
But scrolls is not smooth and i have random margins 1-2px (sometimes ~10 px )
What i do wrong?