Particle position WS Node in material with Niagara DecalRenderer is not meant to be used?

I wanted To use anti stretching decal without tiling but it seems like particle position is not working like intended it is not meant to be used with decal Renderer?
so value of particle position is changing when i move camera.

far and close image ground color is changed by decal



non stretching decal from

it looks like has artifact from complicate normal mesh but look cool

added: oh i can try masking with stretch and using tiled anti stretching uv, like in video, why I was look for harder way. I might make similar effect

manage to make this

Actually Actor position works haha