Untitled

using UnityEngine;

public class ImageTransitionController : MonoBehaviour
{
    public Material transitionMaterial;
    public float transitionSpeed = 1f;

    private float blendValue = 0f;

    void Update()
    {
        // Update the blend value over time
        blendValue += Time.deltaTime * transitionSpeed;
        if (blendValue > 4f) blendValue = 0f; // Loop back to the start

        // Apply the blend value to the material
        transitionMaterial.SetFloat("_Blend", blendValue);
    }
}