Hello,

I hope everyone is doing well.

I’ve encountered an issue where the Object Fade Sprite (fade out/fade in) function no longer works after changing the material on a sprite using Object Change Material.

Context: The shader is designed to turn everything to grayscale. However, it seems to interfere with specific Adventure Creator functions, such as highlight and sprite fade in/out functionality.

Could this be an issue with the script, the material, or something I’m doing wrong?

Thank you in advance, as always, for your help!

Here's the script I used for the shader.

Shader "Custom/GrayscaleWithHighlight"
{
Properties
{
_MainTex("Texture", 2D) = "white" {}
_GrayscaleAmount("Grayscale Amount", Range(0,1)) = 1
_EmissionColor("Emission Color", Color) = (0,0,0)
}
SubShader
{
Tags { "RenderType" = "Transparent" }
Blend SrcAlpha OneMinusSrcAlpha
ZWrite Off
LOD 100

        Pass
        {
            CGPROGRAM
            #pragma vertex vert
            #pragma fragment frag

            sampler2D _MainTex;
            float4 _MainTex_ST;
            float _GrayscaleAmount;
            float4 _EmissionColor;

            struct appdata_t
            {
                float4 vertex : POSITION;
                float2 texcoord : TEXCOORD0;
            };

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

            v2f vert(appdata_t v)
            {
                v2f o;
                o.vertex = UnityObjectToClipPos(v.vertex);
                o.uv = v.texcoord.xy * _MainTex_ST.xy + _MainTex_ST.zw;
                return o;
            }

            float4 frag(v2f i) : SV_Target
            {
                // Sample the texture
                float4 col = tex2D(_MainTex, i.uv);

                // Compute grayscale color
                float gray = dot(col.rgb, float3(0.3, 0.59, 0.11));

                // Blend between original and grayscale
                float4 grayscaleColor = lerp(col, float4(gray, gray, gray, col.a), _GrayscaleAmount);

                // Add emission color for highlighting
                grayscaleColor.rgb += _EmissionColor.rgb;

                // Preserve alpha for transparency
                grayscaleColor.a = col.a;

                return grayscaleColor;
            }
            ENDCG
        }
    }

}