Missing Pbr textures in GI render scene

Thank you for your reply. I have reproduced the problem in the Cad Assistant. There is a lack of contrast material between non-GI rendering and GI rendering. This glb file contains a large number of texture maps

My code looks like this：

Set parameters

Graphic3d_RenderingParams& aPrarms = aView->ChangeRenderingParams();

aPrarms.FrustumCullingState = Graphic3d_RenderingParams::FrustumCulling::FrustumCulling_On;

aPrarms.Method = Graphic3d_RenderingMode::Graphic3d_RM_RAYTRACING;

aPrarms.RaytracingDepth = 3;

aPrarms.SamplesPerPixel = 2;

aPrarms.CoherentPathTracingMode = true;

aPrarms.IsReflectionEnabled = false;

aPrarms.IsTransparentShadowEnabled = true;

aPrarms.TwoSidedBsdfModels = true;

aPrarms.ToneMappingMethod = Graphic3d_ToneMappingMethod_Filmic;

aPrarms.ToEnableDepthPrepass = true;

aPrarms.TransparencyMethod = Graphic3d_RenderTransparentMethod::Graphic3d_RTM_DEPTH_PEELING_OIT;

aPrarms.RebuildRayTracingShaders = true;

aPrarms.IsAntialiasingEnabled = false;

aPrarms.NbMsaaSamples = 1;

aPrarms.ShadingModel = Graphic3d_TypeOfShadingModel::Graphic3d_TOSM_PBR;

aPrarms.UseEnvironmentMapBackground = true;

aPrarms.IsGlobalIlluminationEnabled = true;

Setting IBL Add models and set pbr properties in custom AIS

Handle(RWGltf_MaterialMetallicRoughness) aPbr;
				TopLoc_Location aDummyLoc;
				Handle(RWGltf_GltfLatePrimitiveArray) aLateData = Handle(RWGltf_GltfLatePrimitiveArray)::DownCast(BRep_Tool::Triangulation(aFace, aDummyLoc));
				if (aLateData)
				{
					aPbr = aLateData->MaterialPbr();
				}
				Handle(Graphic3d_ArrayOfTriangles) aArray = StdPrs_ShadedShape::FillTriangles(aFace,true, gp_Pnt2d(0.0, 0.0),gp_Pnt2d(1.0, 1.0),gp_Pnt2d(1.0, 1.0));
				Handle(Graphic3d_Group) aGroup = thePrs->NewGroup();
			
				if (aPbr.IsNull())
				{
					return;
				}



				bool aHasTex = true;
				Standard_Integer aNbTexUnits = 0;
				if (!aPbr->BaseColorTexture.IsNull()) { ++aNbTexUnits; }
				if (!aPbr->EmissiveTexture.IsNull()) { ++aNbTexUnits; }
				if (!aPbr->NormalTexture.IsNull()) { ++aNbTexUnits; }
				if (!aPbr->OcclusionTexture.IsNull()) { ++aNbTexUnits; }
				if (!aPbr->MetallicRoughnessTexture.IsNull()) { ++aNbTexUnits; }
				if (aNbTexUnits == 0)
				{
					aHasTex = false;
				}




				Handle(Graphic3d_Aspects) aAspect = new Graphic3d_Aspects();

					if (aHasTex)
					{
						Handle(Graphic3d_TextureSet) aSet = new Graphic3d_TextureSet(aNbTexUnits);
						auto SetImage = [&](int theIndex, Graphic3d_TextureUnit theType, const  Handle(Image_Texture)& theTexture)
						{
							aSet->SetValue(theIndex, new XCAFPrs_Texture(*theTexture, theType));

						};
						Standard_Integer aTexIter = 0;
						if (aPbr->BaseColorTexture)
						{
							SetImage(aTexIter++, Graphic3d_TextureUnit::Graphic3d_TextureUnit_BaseColor, aPbr->BaseColorTexture);
						}
						if (aPbr->EmissiveTexture)
						{
							SetImage(aTexIter++, Graphic3d_TextureUnit::Graphic3d_TextureUnit_Emissive, aPbr->EmissiveTexture);
						}
						if (aPbr->OcclusionTexture)
						{
							SetImage(aTexIter++, Graphic3d_TextureUnit::Graphic3d_TextureUnit_Occlusion, aPbr->OcclusionTexture);
						}
						if (aPbr->NormalTexture)
						{
							SetImage(aTexIter++, Graphic3d_TextureUnit::Graphic3d_TextureUnit_Normal, aPbr->NormalTexture);
						}
						if (aPbr->MetallicRoughnessTexture)
						{
							SetImage(aTexIter++, Graphic3d_TextureUnit::Graphic3d_TextureUnit_MetallicRoughness, aPbr->MetallicRoughnessTexture);
						}


						aAspect->SetTextureSet(aSet);
						aAspect->SetTextureMapOn();
					}
					else
					{
						aAspect->SetTextureMapOff();
					}
					Graphic3d_MaterialAspect aMaterialAspect(Graphic3d_NameOfMaterial_UserDefined);
					auto aAlpha = aPbr->BaseColor.Alpha();
					auto aMetallic = aPbr->Metallic;
					auto aRoughness = aPbr->Roughness;
					if (aAlpha > 1.0f)
					{
						aAlpha = 1.0f;
					}
					else if (aAlpha<0.0f)
					{
						aAlpha = 0.0f;
					}
					if (aMetallic > 1.0f)
					{
						aMetallic = 1.0f;
					}
					else if (aMetallic<0.0f)
					{
						aMetallic = 0.0f;
					}
					if (aRoughness > 1.0f)
					{
						aRoughness = 1.0f;
					}
					else if (aRoughness<0.0f)
					{
						aRoughness = 0.0f;
						
					}

					aMaterialAspect.SetDiffuseColor(aPbr->BaseColor.GetRGB());
					aMaterialAspect.SetAlpha(aAlpha);
					aMaterialAspect.SetSpecularColor(Quantity_Color(Graphic3d_Vec3(aMetallic)));
					aMaterialAspect.SetShininess(1.0f - aRoughness);
					if (aMaterialAspect.Shininess() < 0.01f)
					{
						aMaterialAspect.SetShininess(0.01f);
					}
					aMaterialAspect.SetEmissiveColor(Quantity_Color(aPbr->EmissiveFactor.cwiseMin(Graphic3d_Vec3(1.0f))));


					Graphic3d_PBRMaterial aPbrMaterial;
					aPbrMaterial.SetColor(aPbr->BaseColor.GetRGB());
					aPbrMaterial.SetAlpha(aAlpha);
					aPbrMaterial.SetMetallic(aMetallic);
					aPbrMaterial.SetEmission(aPbr->EmissiveFactor);
					aPbrMaterial.SetRoughness(aRoughness);
					aPbrMaterial.SetIOR(1.5);
					aMaterialAspect.SetRefractionIndex(1.5);
					aMaterialAspect.SetPBRMaterial(aPbrMaterial);
					aMaterialAspect.SetBSDF(Graphic3d_BSDF::CreateMetallicRoughness(aPbrMaterial));
					aAspect->SetFrontMaterial(aMaterialAspect);
					
					aAspect->SetShadingModel(Graphic3d_TypeOfShadingModel::Graphic3d_TypeOfShadingModel_Pbr);


				aGroup->AddPrimitiveArray(aArray);
				aGroup->SetGroupPrimitivesAspect(aAspect);

Unable to upload files larger than 5M, I split the model into 4 pieces

I did "myAISContext->EraseAll(true)" before import; ", respectively import the split model, no white material appears; But remove "myAISContext->EraseAll(true); ", continuous import, after the import of the model will lose materials

The split model in the Cad Assistant is also GI rendering normal, you can merge into a glb to test