sets texture on block for later use in unity

settexture.cs

using UnityEngine;
using System.Collections;

[ExecuteInEditMode]
public class SetMaterial : MonoBehaviour {
	public Texture2D texture;
	private MaterialPropertyBlock prop;

	void OnRenderObject () {
		// materialpropertyblock is what components pass data into, then to the shader
		prop = new MaterialPropertyBlock ();
		prop.SetTexture("_MainTex", texture);
		Renderer r = GetComponent<Renderer> ();
		r.SetPropertyBlock (prop);
	}

	void Awake(){
		// make sure we do it first frame too
		// since onRenderObject only gets autocalled in editor mode
		OnRenderObject ();
	}
}


// then, in your shaderlab Properties area, declair your main tex like so:
// // [PER RENDERER DATA] means take texture from materialpropertyblock
// [PerRendererData] _MainTex ("Sprite Texture", 2D) = "white" {}