Hello,
I’ve modified Standard shader so that it can render two textures combined by a mask. Its albedo is all fine but the normal won’t come out.
- Unity’s standard shader with normal
- Unity’s standard shader and my shader without normal
- Unity’s standard shader and my shader with normal
I’ve attached a unitypackage with scene, shaders, and cgincs. I suspect the “#ifdef _NORMALMAP” at “UnityStandardInput.cginc” is false or something. Why is that? How can I modify my shader to make the normal appears?
2795593–202762–StandardTwoTextures.unitypackage (346 KB)
Seen you didn’t enable the _NORMALMAP keyword. CustomEditor “StandardShaderGUI” do the job. You need to create your custom editor.
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Oh I see.
So I skipped creating custom editor and edited the cginc directly to enable the normals by modifying these files:
// Test_UnityStandardCore.cginc
half3 PerPixelWorldNormal(float4 i_tex, half4 tangentToWorld[3]) {
half3 tangent = tangentToWorld[0].xyz;
half3 binormal = tangentToWorld[1].xyz;
half3 normal = tangentToWorld[2].xyz;
half3 normalTangent = NormalInTangentSpace(i_tex);
half3 normalWorld = NormalizePerPixelNormal(tangent * normalTangent.x + binormal * normalTangent.y + normal * normalTangent.z);
return normalWorld;
}
// Test_UnityStandardInput.cginc
//#ifdef _NORMALMAP
half3 NormalInTangentSpace(float4 texcoords) {
float4 mask = tex2D(_MainTex, texcoords.xy);
half3 normalTangent = UnpackScaleNormal(tex2D(_BumpMap, texcoords.xy), _BumpScale) * mask.r +
UnpackScaleNormal(tex2D(_Normal2, texcoords.xy), _BumpScale) * (1 - mask.r);
return normalTangent;
}
//#endif
But still the normals won’t come out at 0 to 1 normal value (_BumpScale). If I fill the normal value with values over 1, some black artifact appears.
You should multiple mask.r with _BumpScale and not the unpacked normal.
Hmm, it doesn’t work. Weirdly it’s the same when I use only the first normal.
normalTangent = UnpackScaleNormal(tex2D(_BumpMap, texcoords.xy), _BumpScale);
I try. It seem working.
float4 mask = tex2D(_MainTex, texcoords.xy);
half3 normalTangent = UnpackScaleNormal(tex2D(_BumpMap, texcoords.xy), _BumpScale * mask.r)+
UnpackScaleNormal(tex2D(_Normal2, texcoords.xy), _BumpScale * (1 - mask.r));
Was my PerPixelWorldNormal wrong? What did I miss?
Ow man it (magically) works by creating the editor!
Thank you @tsangwailam
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