Compute Shader Issue (.cs)

.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class CCA2DCustom : MonoBehaviour
{
    //Rendering stuff
    private RenderTexture inRT;
    private RenderTexture outRT;

    public ComputeShader ccaShader;
    public Material outMat;
    

    public int res = 128;

    //IDs
    private int startKernelID;
    private int stepKernelID;


    private void ConfigureTexture()
    {
        inRT = new RenderTexture(res, res, 0);
        inRT.enableRandomWrite = true;
        inRT.filterMode = FilterMode.Point;
        inRT.wrapMode = TextureWrapMode.Repeat;
        inRT.format = RenderTextureFormat.ARGB32;
        inRT.Create();

        outRT = new RenderTexture(res, res, 0);
        outRT.enableRandomWrite = true;
        outRT.filterMode = FilterMode.Point;
        outRT.wrapMode = TextureWrapMode.Repeat;
        outRT.format = RenderTextureFormat.ARGB32;
        outRT.Create();
    }

    private void Start()
    {
        ConfigureTexture();

        startKernelID = ccaShader.FindKernel("StartKernel");
        stepKernelID = ccaShader.FindKernel("StepKernel");

        ccaShader.SetTexture(startKernelID, "_inTex", inRT);

        
        ccaShader.SetTexture(stepKernelID, "_inTex", inRT);
        ccaShader.SetTexture(stepKernelID, "_outTex", outRT);

        outMat.SetTexture("_UnlitColorMap", outRT);

        ccaShader.Dispatch(startKernelID, res/8, res/8, 1);
    }

    private void Update()
    {
        ccaShader.Dispatch(stepKernelID, res / 8, res / 8, 1);
    }
}