Version: 2020.3
  • C#

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public void SetMatrix(string name, Matrix4x4 value);


public void SetMatrix(int nameID, Matrix4x4 value);


nameID Property name ID, use Shader.PropertyToID to get it.
name Property name, e.g. "_CubemapRotation".
value Matrix value to set.


Sets a named matrix for the shader.

This is mostly used with custom shaders that need extra matrix parameters. Matrix parameters are not exposed in the material inspector, but can be set and queried with SetMatrix and GetMatrix from scripts.

See Also: GetMatrix, Materials, ShaderLab documentation, Shader.PropertyToID, Properties in Shader Programs.

using UnityEngine;

public class ExampleClass : MonoBehaviour { // Attach to an object that has a Renderer component, // and use material with the shader below. public float rotateSpeed = 30f; public void Update() { // Construct a rotation matrix and set it for the shader Quaternion rot = Quaternion.Euler(0, 0, Time.time * rotateSpeed); Matrix4x4 m = Matrix4x4.TRS(, rot,; GetComponent<Renderer>().material.SetMatrix("_TextureRotation", m); } }
// Use this shader on an object together with the above example script.
// The shader transforms texture coordinates with a matrix set from a script.
Shader "RotatingTexture"
        _MainTex ("Base (RGB)", 2D) = "white" {}
            #pragma vertex vert
            #pragma fragment frag

struct v2f { float2 uv : TEXCOORD0; float4 pos : SV_POSITION; };

float4x4 _TextureRotation;

v2f vert (float4 pos : POSITION, float2 uv : TEXCOORD0) { v2f o; o.pos = UnityObjectToClipPos(pos); o.uv = mul(_TextureRotation, float4(uv,0,1)).xy; return o; }

sampler2D _MainTex; fixed4 frag (v2f i) : SV_Target { return tex2D(_MainTex, i.uv); } ENDCG } } }