I made a custom shading model along this link. However, the shadows of all objects using Toon shading are displayed in black.
Turning off the shadows shows the shading I want, but only the shadows seem to show in black.
//DeferredLightingCommon.ush
//
FLightAccumulator AccumulateDynamicToonLighting(
float3 TranslatedWorldPosition, half3 CameraVector, FGBufferData GBuffer, half AmbientOcclusion, uint ShadingModelID,
FDeferredLightData LightData, half4 LightAttenuation, float Dither, uint2 SVPos,
inout float SurfaceShadow)
{
FLightAccumulator LightAccumulator = (FLightAccumulator) 0;
//
half3 V = -CameraVector;
half3 N = GBuffer.WorldNormal;
//
float3 L = LightData.Direction; // Already normalized
float3 ToLight = L;
float3 MaskedLightColor = LightData.Color;
float LightMask = 1;
if (LightData.bRadialLight)
{
LightMask = GetLocalLightAttenuation(TranslatedWorldPosition, LightData, ToLight, L);
MaskedLightColor *= LightMask;
}
//
LightAccumulator.EstimatedCost += 0.3f; // running the PixelShader at all has a cost
//
BRANCH
if (LightMask <= 0)
{
return LightAccumulator;
}
//
FShadowTerms Shadow;
Shadow.SurfaceShadow = AmbientOcclusion;
Shadow.TransmissionShadow = 1;
Shadow.TransmissionThickness = 1;
Shadow.HairTransmittance.OpaqueVisibility = 1;
const float ContactShadowOpacity = GBuffer.CustomData.a;
GetShadowTerms(GBuffer.Depth, GBuffer.PrecomputedShadowFactors, GBuffer.ShadingModelID, ContactShadowOpacity, LightData, TranslatedWorldPosition, L, LightAttenuation, Dither, Shadow);
SurfaceShadow = Shadow.SurfaceShadow;
//
LightAccumulator.EstimatedCost += 0.3f; // add the cost of getting the shadow terms
//
FDirectLighting Lighting;
//
if (LightData.bRectLight)
{
FRect Rect = GetRect(ToLight, LightData);
const FRectTexture SourceTexture = ConvertToRectTexture(LightData);
Lighting = IntegrateBxDF(GBuffer, N, V, Rect, Shadow, SourceTexture); // not support ‘REFERENCE_QUALITY’
}
else
{
FCapsuleLight Capsule = GetCapsule(ToLight, LightData);
Lighting = IntegrateBxDF(GBuffer, N, V, Capsule, Shadow, LightData.bInverseSquared); // not support ‘REFERENCE_QUALITY’
}
//
Lighting.Specular *= LightData.SpecularScale;
//
// else: 追加ライトの場合は正規化なし＆スカイライトカラーを加算しない
BRANCH if (LightData.bSpotLight == false && LightData.bRectLight == false)
{
const float SqrtThree = 1.73205080756888; // length((float3)1.0)) > sqrt(3.0)
//
// Affect LightColor
float MainLightAttenuation = saturate(SqrtThree / length(MaskedLightColor));
MaskedLightColor *= MainLightAttenuation;
//
// Affect SkyLightColor
float SkyLightAttenuation = saturate(SqrtThree / length(View.SkyLightColor.rgb));
MaskedLightColor += View.SkyLightColor.rgb * SkyLightAttenuation;
//
// Clamp to approx 0.0 … 1.0
MaskedLightColor *= saturate(SqrtThree / length(MaskedLightColor));
}
//
LightAccumulator_AddSplit(LightAccumulator, Lighting.Diffuse, Lighting.Specular, 0.0, MaskedLightColor, false);
//
LightAccumulator.EstimatedCost += 0.4f; // add the cost of the lighting computations (should sum up to 1 form one light)
//
return LightAccumulator;}
In this code, I did this to use Skylight
BRANCH if (LightData.bSpotLight == false && LightData.bRectLight == false)
{
const float SqrtThree = 1.73205080756888; // length((float3)1.0)) > sqrt(3.0)
//
// Affect LightColor
float MainLightAttenuation = saturate(SqrtThree / length(MaskedLightColor));
MaskedLightColor *= MainLightAttenuation;
//
// Affect SkyLightColor
float SkyLightAttenuation = saturate(SqrtThree / length(View.SkyLightColor.rgb));
MaskedLightColor += View.SkyLightColor.rgb * SkyLightAttenuation;
//
// Clamp to approx 0.0 … 1.0
MaskedLightColor *= saturate(SqrtThree / length(MaskedLightColor));
}
//
LightAccumulator_AddSplit(LightAccumulator, Lighting.Diffuse, Lighting.Specular, 0.0, MaskedLightColor, false);
//
LightAccumulator.EstimatedCost += 0.4f; // add the cost of the lighting computations (should sum up to 1 form one light)
//
return LightAccumulator;
In my opinion, from version 5.4 “View.SkyLightColor.rgb” doesn’t seem to work.
If not, is there any other reason why shadows come out black?