A licensee is seeing an issue with a couple of post process materials after enabling ray tracing. While the materials presenting the issue fail to compile for different reasons, they both refernce that the offending variable is within an enclosing function. Perhaps that commonality is the root of the issue.
Errors from M_PlanetaryAtmosphere_PP_lut_00:
[SM5] D3DCompileToDxil failed [SM5] /Engine/Generated/Material.ush(2112:45): error: reference to local variable 'integralLUTSampler' declared in enclosing function 'CustomExpression3' Fxh.x = integralLUT.SampleLevel(integralLUTSampler, float2(r/rangeRM.x, v), 0).x; ^ [SM5] /Engine/Generated/Material.ush:2043:216: note: 'integralLUTSampler' declared here float3 CustomExpression3(FMaterialPixelParameters Parameters, float3 Dcam, float3 Oview, float hv2, float3 camPos, float2 tvrPx, float3 DRpx, float4 viewDots, float3 RR2,Texture2D integralLUT, SamplerState integralLUTSampler , float4 tvShd, float3 LightIo, float4 RMphase, float3 bRs, float3 bMe, float3 Mbse, float3 SceneColor, float3 BaseColor, float4 pxPos, float2 SSWP, float4 attenHardnessSWA, float4 minAttenuation, float4 tvLimitsH0, float4 tvLimitCoefs, float4 MultiScattered, float2 rangeRM, float4 RoDensityRM, float MapGLB) ^ [SM5] /Engine/Generated/Material.ush(2118:45): error: reference to local variable 'integralLUTSampler' declared in enclosing function 'CustomExpression3' Fxh.y = integralLUT.SampleLevel(integralLUTSampler, float2(r/rangeRM.y, v), 0).y; ^
Errors from M_PlanetaryAtmosphere_PP_prec_09:
[SM5] /Engine/Generated/Material.ush(2011:60): error: default argument references local variable 'samplesNum' of enclosing function float2 IntegrateFromNegInfToPosInf(float h2, int num = samplesNum) ^~~~~~~~~~ [SM5] /Engine/Generated/Material.ush(2031:76): error: default argument references local variable 'samplesNum' of enclosing function float2 IntegrateOneSidedFromAtoB(float a, float b, float h2, int num = samplesNum) ^~~~~~~~~~ [SM5] /Engine/Generated/Material.ush(2084:68): error: default argument references local variable 'samplesNum' of enclosing function float2 IntegrateFromAtoB(float a, float b, float h2, int num = samplesNum) ^~~~~~~~~~ [SM5] /Engine/Generated/Material.ush(2169:67): error: default argument references local variable 'samplesNum' of enclosing function float2 IntegrateFromNegInfToNegX(float x, float h2, int num = samplesNum) ^~~~~~~~~~ [SM5] /Engine/Generated/Material.ush(2190:61): error: default argument references local variable 'samplesNum' of enclosing function float2 IntegrateFromNegInf(float x, float h2, int num = samplesNum) ^~~~~~~~~~ [SM5] /Engine/Generated/Material.ush(2256:114): error: default argument references local variable 'samplesNum' of enclosing function float2 EffectiveDensity(float a, float b, float3 Dcam, float3 Oview, float dotDlDv, float dotDlDo, int num = samplesNum) ^~~~~~~~~~ [SM5] /Engine/Generated/Material.ush(2291:78): error: default argument references local variable 'samplesNum' of enclosing function float2 EffectiveDensityRadial(float a, float b, float dotDlDv, int num = samplesNum) ^~~~~~~~~~ [SM5] /Engine/Generated/Material.ush(2416:58): error: too few arguments to function call, expected 3, have 2 float2 Ip = denI.IntegrateFromNegInf(pxPos.x, pxPos.y); ~~~~~~~~~~~~~~~~~~~~~~~~ ^ [SM5] /Engine/Generated/Material.ush:2190:5: note: 'IntegrateFromNegInf' declared here float2 IntegrateFromNegInf(float x, float h2, int num = samplesNum) ^ [SM5] /Engine/Generated/Material.ush(2459:53): error: too few arguments to function call, expected 4, have 3 RMIdensity = denI.IntegrateFromAtoB(tvpx, tvCam, hv2); ~~~~~~~~~~~~~~~~~~~~~~ ^ [SM5] /Engine/Generated/Material.ush:2084:5: note: 'IntegrateFromAtoB' declared here float2 IntegrateFromAtoB(float a, float b, float h2, int num = samplesNum) ^ [SM5] /Engine/Generated/Material.ush(2460:88): error: too few arguments to function call, expected 7, have 6 RMIeff = denI.EffectiveDensity(max(tvA, tvpx), tvB, Dcam, Oview, viewDots.x, viewDots.y); ~~~~~~~~~~~~~~~~~~~~~ ^ [SM5] /Engine/Generated/Material.ush:2256:5: note: 'EffectiveDensity' declared here float2 EffectiveDensity(float a, float b, float3 Dcam, float3 Oview, float dotDlDv, float dotDlDo, int num = samplesNum) ^ [SM5] /Engine/Generated/Material.ush(2475:64): error: too few arguments to function call, expected 4, have 3 Isegmented[0] = denI.IntegrateFromAtoB(tvpx, tvCam, hv2); ~~~~~~~~~~~~~~~~~~~~~~ ^ [SM5] /Engine/Generated/Material.ush(2492:71): error: too few arguments to function call, expected 4, have 3 Isegmented[1] = denI.IntegrateFromAtoB(tvShd.y, tvCam, hv2); ~~~~~~~~~~~~~~~~~~~~~~ ^ [SM5] /Engine/Generated/Material.ush(2496:73): error: too few arguments to function call, expected 4, have 3 Isegmented[0] = denI.IntegrateFromAtoB(midLims.x, midLims.y, hv2); ~~~~~~~~~~~~~~~~~~~~~~ ^ [SM5] D3DCompileToDxil failed
Result:
Observe that the material fails to compile when ray tracing is enabled
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-87365 in the post.
| 7 |
| Component | UE - Rendering Architecture - RHI |
|---|---|
| Affects Versions | 4.24.1 |
| Target Fix | 4.25 |
| Created | Jan 23, 2020 |
|---|---|
| Resolved | Mar 5, 2020 |
| Updated | Mar 13, 2020 |