Unity Field Of View Visualisation Transparent Texture Problem

Hi;

I have a problem with transparency textures with "Field Of View Visualisation" title
(In This Video: https://www.youtube.com/watch?v=73Dc5JTCmKI&list=PLFt_AvWsXl0dohbtVgHDNmgZV_UY7xZv7∈dex=2 .

I did everything same with this video and tried to change material with transparency texture but field was not be transparent.

Here is the images to explain my problem:

This is the plain that added EnemyFieldOfView1 material with Surface Type : Transparent Base Map : "white to transparent texture". It works fine.

When I add this material to object that have FieldOfView script mentioned in the video, it is not working.

Here is the material properties.

I tried to change texture rotation and make it gradient with black-white but it wasn't work.

When i tried this texture rotate 180 degree, this time it was just white.

The field just accept one color.

How can i make it from white to transparent ?