Ok I have looked at all relevant questions including RenderSettings Skybox lerp - I am just trying to lerp between SHADERS or materials, specifically the one assigned to RenderSettings.skybox
My reason for lerping the actual shader is I have my skybox set to a custom rotating skybox shader that uses cube maps. I tried to lerp the cube maps assigned to this material but did not work. Here is the existing rotating skybox shader:
// Made with Amplify Shader Editor
// Available at the Unity Asset Store - http://u3d.as/y3X
Shader "Skybox/Cubemap Extended"
{
Properties
{
[Gamma][Header(Cubemap)]_TintColor("Tint Color", Color) = (0.5,0.5,0.5,1)
_Exposure("Exposure", Range( 0 , 8)) = 1
[NoScaleOffset]_Tex("Cubemap (HDR)", CUBE) = "black" {}
[Header(Rotation)][Toggle(_ENABLEROTATION_ON)] _EnableRotation("Enable Rotation", Float) = 0
[IntRange]_Rotation("Rotation", Range( 0 , 360)) = 0
_RotationSpeed("Rotation Speed", Float) = 1
[Header(Fog)][Toggle(_ENABLEFOG_ON)] _EnableFog("Enable Fog", Float) = 0
_FogHeight("Fog Height", Range( 0 , 1)) = 1
_FogSmoothness("Fog Smoothness", Range( 0.01 , 1)) = 0.01
_FogFill("Fog Fill", Range( 0 , 1)) = 0.5
[HideInInspector]_Tex_HDR("DecodeInstructions", Vector) = (0,0,0,0)
[HideInInspector] __dirty( "", Int ) = 1
}
SubShader
{
Tags{ "RenderType" = "Background" "Queue" = "Background+0" "IgnoreProjector" = "True" "ForceNoShadowCasting" = "True" "IsEmissive" = "true" "PreviewType"="Skybox" }
LOD 100
Cull Off
ZWrite Off
CGPROGRAM
#include "UnityShaderVariables.cginc"
#pragma target 2.0
#pragma shader_feature _ENABLEFOG_ON
#pragma shader_feature _ENABLEROTATION_ON
#pragma surface surf Unlit keepalpha noshadow noambient novertexlights nolightmap nodynlightmap nodirlightmap nofog nometa noforwardadd vertex:vertexDataFunc
struct Input
{
float3 vertexToFrag774;
float3 worldPos;
};
uniform half4 _Tex_HDR;
uniform samplerCUBE _Tex;
uniform half _Rotation;
uniform fixed _RotationSpeed;
uniform fixed4 _TintColor;
uniform half _Exposure;
uniform fixed _FogHeight;
uniform fixed _FogSmoothness;
uniform fixed _FogFill;
inline half3 DecodeHDR1189( half4 Data )
{
return DecodeHDR(Data, _Tex_HDR);
}
void vertexDataFunc( inout appdata_full v, out Input o )
{
UNITY_INITIALIZE_OUTPUT( Input, o );
float3 ase_worldPos = mul( unity_ObjectToWorld, v.vertex );
float lerpResult268 = lerp( 1.0 , ( unity_OrthoParams.y / unity_OrthoParams.x ) , unity_OrthoParams.w);
fixed CAMERA_MODE300 = lerpResult268;
float3 appendResult1129 = (float3(ase_worldPos.x , ( ase_worldPos.y * CAMERA_MODE300 ) , ase_worldPos.z));
float3 normalizeResult1130 = normalize( appendResult1129 );
float mulTime701 = _Time.y * 1;
float3 appendResult56 = (float3(cos( radians( ( _Rotation + ( mulTime701 * _RotationSpeed ) ) ) ) , 0.0 , ( sin( radians( ( _Rotation + ( mulTime701 * _RotationSpeed ) ) ) ) * -1.0 )));
float3 appendResult266 = (float3(0.0 , CAMERA_MODE300 , 0.0));
float3 appendResult58 = (float3(sin( radians( ( _Rotation + ( mulTime701 * _RotationSpeed ) ) ) ) , 0.0 , cos( radians( ( _Rotation + ( mulTime701 * _RotationSpeed ) ) ) )));
float3 normalizeResult247 = normalize( ase_worldPos );
#ifdef _ENABLEROTATION_ON
float3 staticSwitch1164 = mul( float3x3(appendResult56, appendResult266, appendResult58), normalizeResult247 );
#else
float3 staticSwitch1164 = normalizeResult1130;
#endif
o.vertexToFrag774 = staticSwitch1164;
}
inline fixed4 LightingUnlit( SurfaceOutput s, half3 lightDir, half atten )
{
return fixed4 ( 0, 0, 0, s.Alpha );
}
void surf( Input i , inout SurfaceOutput o )
{
half4 Data1189 = texCUBE( _Tex, i.vertexToFrag774 );
half3 localDecodeHDR1189 = DecodeHDR1189( Data1189 );
fixed4 CUBEMAP222 = ( float4( localDecodeHDR1189 , 0.0 ) * unity_ColorSpaceDouble * _TintColor * _Exposure );
float3 ase_worldPos = i.worldPos;
float3 normalizeResult319 = normalize( ase_worldPos );
float lerpResult678 = lerp( saturate( pow( (0.0 + (abs( normalizeResult319.y ) - 0.0) * (1.0 - 0.0) / (_FogHeight - 0.0)) , ( 1.0 - _FogSmoothness ) ) ) , 0.0 , _FogFill);
fixed FOG_MASK359 = lerpResult678;
float4 lerpResult317 = lerp( unity_FogColor , CUBEMAP222 , FOG_MASK359);
#ifdef _ENABLEFOG_ON
float4 staticSwitch1179 = lerpResult317;
#else
float4 staticSwitch1179 = CUBEMAP222;
#endif
o.Emission = staticSwitch1179.rgb;
o.Alpha = 1;
}
ENDCG
}
}
I need to lerp to a new Cubemap as this shader's texture. Since I cant do this directly I tried this:
RenderSettings.skybox.Lerp(RenderSettings.skybox, blendedSkybox, 3f);
in my Update() method, but this did nothing. I am new to shaders - how can I lerp between these cube maps or LERP the RenderSettings skybox material?
I don't want to use a blend shader because again, this existing shader rotates and the blended ones do not.
float t = 0f;
// Update is called once per frame
void Update () {
//if (Input.GetKeyDown("return"))
//{
// BlendBetweenSkyboxes(skyboxes[0], skyboxes[1]);
//}
RenderSettings.skybox.Lerp(overallSkybox, blendedSkybox, t);
// .. and increase the t interpolater
t += 0.1f * Time.deltaTime;
// now check if the interpolator has reached 1.0
// and swap maximum and minimum so game object moves
// in the opposite direction.
if (t > 1.0f)
{
print("done");
}
