Unity RenderTexture 当作为 Camera.targetTexture 时，在某些安卓手机或模拟器无法显示或出现错乱 以及粒子无法正常显示

using UnityEngine;
using UnityEngine.UI;

public class Test:MonoBehaviour{
    
    public RawImage rawImage;
    public Camera cam;

    private RenderTexture m_renderTexture;
    
    private void Start(){
        m_renderTexture=new RenderTexture(512,512,16,RenderTextureFormat.ARGB32);

        rawImage.texture=m_renderTexture;
        cam.targetTexture=m_renderTexture;
        //必须为 CameraClearFlags.SolidColor或CameraClearFlags.Depth，CameraClearFlags.Nothing 时会不显示
        cam.clearFlags=CameraClearFlags.SolidColor;
        
        //CameraClearFlags.SolidColor时会有背景色，需要设置背景色透明
        Color color=cam.backgroundColor;
        color.a=0f;
        cam.backgroundColor=color;
    }
}