alphaMAP problem

Hi everyone,
i always use alphamap to get the transparent area of the texture like this
type 1,
tile: 1,
side: THREE.DoubleSide,
opacity: 1.0,
envMapIntensity: 1.0,
color: new THREE.Color (0xffffff),
alphaMap: “floor-a.png”,
map: “floor.png”,
transparent: true,
but for some reason when I apply the alphamap the plane is gone

You’ll have to share more information and code (ideally, a JSFiddle or Codepen) to reproduce this problem I think.

sorry for late response but i have solve my problem it was the image it self thank you anyway