为什么我无法使用多个投影器？

[OtakuAndFitness]

场景里只能用一个，想用多个的话也只能看见一个

[Yogioo]

场景里只能用一个，想用多个的话也只能看见一个

CubeProjector 38行中需要设置为mr.material.SetMatrix("_WorldToProjector", m_worldToProjector);
因为之前设置了ShareMaterial 所以被覆盖了

[notnowIthaca]

float4x4 _WorldToProjector; is not an exposed property, so different materials share the same VP matrix, making all the decals overlap. However, the shader lab language doesnt accept matrices as exposed property.
I am using URP, and I put the float4x4 _WorldToProjector; into CBUFFER. It works! but I'm not sure if this is the right way