TextureHandle RenderVolumetricClouds_Accumulation(RenderGraph renderGraph, HDCamera hdCamera, TVolumetricCloudsCameraType cameraType,
TextureHandle colorBuffer, TextureHandle depthPyramid, TextureHandle motionVectors, TextureHandle volumetricLighting, TextureHandle maxZMask)
{
using (var builder = renderGraph.AddRenderPass <VolumetricCloudsAccumulationData>("Volumetric Clouds", out var passData, ProfilingSampler.Get(HDProfileId.VolumetricClouds)))
{
builder.EnableAsyncCompute(false);
VolumetricClouds settings = hdCamera.volumeStack.GetComponent <VolumetricClouds>();
passData.parameters = PrepareVolumetricCloudsParameters_Accumulation(hdCamera, settings, cameraType, EvaluateVolumetricCloudsHistoryValidity(hdCamera, settings.localClouds.value));
passData.colorBuffer = builder.ReadTexture(builder.WriteTexture(colorBuffer));
passData.depthPyramid = builder.ReadTexture(depthPyramid);
passData.motionVectors = builder.ReadTexture(motionVectors);
passData.maxZMask = settings.localClouds.value ? renderGraph.defaultResources.blackTextureXR : builder.ReadTexture(maxZMask);
passData.ambientProbeBuffer = builder.ReadComputeBuffer(renderGraph.ImportComputeBuffer(m_CloudsProbeBuffer));
passData.volumetricLighting = builder.ReadTexture(volumetricLighting);
passData.scatteringFallbackTexture = renderGraph.defaultResources.blackTexture3DXR;
passData.currentHistoryBuffer0 = renderGraph.ImportTexture(RequestCurrentVolumetricCloudsHistoryTexture0(hdCamera));
passData.previousHistoryBuffer0 = renderGraph.ImportTexture(RequestPreviousVolumetricCloudsHistoryTexture0(hdCamera));
passData.currentHistoryBuffer1 = renderGraph.ImportTexture(RequestCurrentVolumetricCloudsHistoryTexture1(hdCamera));
passData.previousHistoryBuffer1 = renderGraph.ImportTexture(RequestPreviousVolumetricCloudsHistoryTexture1(hdCamera));
passData.intermediateBuffer0 = builder.CreateTransientTexture(new TextureDesc(Vector2.one * 0.5f, true, true)
{
colorFormat = GraphicsFormat.R16G16B16A16_SFloat, enableRandomWrite = true, name = "Temporary Clouds Lighting Buffer 0"
});
passData.intermediateBuffer1 = builder.CreateTransientTexture(new TextureDesc(Vector2.one * 0.5f, true, true)
{
colorFormat = GraphicsFormat.R16G16B16A16_SFloat, enableRandomWrite = true, name = "Temporary Clouds Lighting Buffer 1 "
});
passData.intermediateBufferDepth0 = builder.CreateTransientTexture(new TextureDesc(Vector2.one * 0.5f, true, true)
{
colorFormat = GraphicsFormat.R32_SFloat, enableRandomWrite = true, name = "Temporary Clouds Depth Buffer 0"
});
passData.intermediateBufferDepth1 = builder.CreateTransientTexture(new TextureDesc(Vector2.one * 0.5f, true, true)
{
colorFormat = GraphicsFormat.R32_SFloat, enableRandomWrite = true, name = "Temporary Clouds Depth Buffer 1"
});
passData.intermediateColorBufferCopy = passData.parameters.needExtraColorBufferCopy ? builder.CreateTransientTexture(new TextureDesc(Vector2.one, true, true)
{
colorFormat = GetColorBufferFormat(), enableRandomWrite = true, name = "Temporary Color Buffer"
}) : renderGraph.defaultResources.blackTextureXR;
if (passData.parameters.needsTemporaryBuffer)
{
passData.intermediateBufferUpscale = builder.CreateTransientTexture(new TextureDesc(Vector2.one, true, true)
{
colorFormat = GraphicsFormat.R16G16B16A16_SFloat, enableRandomWrite = true, name = "Temporary Clouds Upscaling Buffer"
});
}
else
{
passData.intermediateBufferUpscale = renderGraph.defaultResources.blackTexture;
}
if (passData.parameters.commonData.cameraType == TVolumetricCloudsCameraType.PlanarReflection)
{
passData.intermediateBufferDepth2 = builder.CreateTransientTexture(new TextureDesc(Vector2.one, true, true)
{
colorFormat = GraphicsFormat.R32_SFloat, enableRandomWrite = true, name = "Temporary Clouds Depth Buffer 2"
});
}
else
{
passData.intermediateBufferDepth2 = renderGraph.defaultResources.blackTexture;
}
builder.SetRenderFunc(
(VolumetricCloudsAccumulationData data, RenderGraphContext ctx) =>
{
TraceVolumetricClouds_Accumulation(ctx.cmd, data.parameters, data.ambientProbeBuffer,
data.colorBuffer, data.depthPyramid, data.motionVectors, data.volumetricLighting, data.scatteringFallbackTexture, data.maxZMask,
data.currentHistoryBuffer0, data.previousHistoryBuffer0, data.currentHistoryBuffer1, data.previousHistoryBuffer1,
data.intermediateBuffer0, data.intermediateBuffer1, data.intermediateBufferDepth0, data.intermediateBufferDepth1, data.intermediateBufferDepth2,
data.intermediateColorBufferCopy, data.intermediateBufferUpscale);
});
// Push the texture to the debug menu
PushFullScreenDebugTexture(m_RenderGraph, passData.currentHistoryBuffer0, FullScreenDebugMode.VolumetricClouds);
// We return the volumetric clouds buffers rendered at half resolution. We should ideally return the full resolution transmittance, but
// this should be enough for the initial case (which is the lens flares). The transmittance can be found in the alpha channel.
return(passData.currentHistoryBuffer0);
}
}
VolumetricCloudsParameters_Accumulation PrepareVolumetricCloudsParameters_Accumulation(HDCamera hdCamera, VolumetricClouds settings, TVolumetricCloudsCameraType cameraType, bool historyValidity)
{
VolumetricCloudsParameters_Accumulation parameters = new VolumetricCloudsParameters_Accumulation();
// Compute the cloud model data
CloudModelData cloudModelData = GetCloudModelData(settings);
// Fill the common data
FillVolumetricCloudsCommonData(hdCamera.exposureControlFS, settings, cameraType, in cloudModelData, ref parameters.commonData);
// We need to make sure that the allocated size of the history buffers and the dispatch size are perfectly equal.
// The ideal approach would be to have a function for that returns the converted size from a viewport and texture size.
// but for now we do it like this.
// Final resolution at which the effect should be exported
parameters.finalWidth = hdCamera.actualWidth;
parameters.finalHeight = hdCamera.actualHeight;
// Intermediate resolution at which the effect is accumulated
parameters.intermediateWidth = Mathf.RoundToInt(0.5f * hdCamera.actualWidth);
parameters.intermediateHeight = Mathf.RoundToInt(0.5f * hdCamera.actualHeight);
// Resolution at which the effect is traced
parameters.traceWidth = Mathf.RoundToInt(0.25f * hdCamera.actualWidth);
parameters.traceHeight = Mathf.RoundToInt(0.25f * hdCamera.actualHeight);
parameters.viewCount = hdCamera.viewCount;
parameters.previousViewportSize = hdCamera.historyRTHandleProperties.previousViewportSize;
parameters.historyValidity = historyValidity;
// MSAA support
parameters.needsTemporaryBuffer = hdCamera.msaaEnabled;
parameters.cloudCombinePass = m_CloudCombinePass;
parameters.needExtraColorBufferCopy = (GetColorBufferFormat() == GraphicsFormat.B10G11R11_UFloatPack32 &&
// On PC and Metal, but not on console.
(SystemInfo.graphicsDeviceType == GraphicsDeviceType.Direct3D11 ||
SystemInfo.graphicsDeviceType == GraphicsDeviceType.Direct3D12 ||
SystemInfo.graphicsDeviceType == GraphicsDeviceType.Metal ||
SystemInfo.graphicsDeviceType == GraphicsDeviceType.Vulkan));
// In case of MSAA, we no longer require the preliminary copy as there is no longer a need for RW of the color buffer.
parameters.needExtraColorBufferCopy &= !parameters.needsTemporaryBuffer;
// Compute shader and kernels
parameters.convertObliqueDepthKernel = m_ConvertObliqueDepthKernel;
parameters.depthDownscaleKernel = m_CloudDownscaleDepthKernel;
parameters.renderKernel = m_CloudRenderKernel;
parameters.reprojectKernel = settings.ghostingReduction.value ? m_ReprojectCloudsRejectionKernel : m_ReprojectCloudsKernel;
parameters.upscaleAndCombineKernel = parameters.needExtraColorBufferCopy ? m_UpscaleAndCombineCloudsKernelColorCopy : m_UpscaleAndCombineCloudsKernelColorRW;
// Update the constant buffer
VolumetricCloudsCameraData cameraData;
cameraData.cameraType = parameters.commonData.cameraType;
cameraData.traceWidth = parameters.traceWidth;
cameraData.traceHeight = parameters.traceHeight;
cameraData.intermediateWidth = parameters.intermediateWidth;
cameraData.intermediateHeight = parameters.intermediateHeight;
cameraData.finalWidth = parameters.finalWidth;
cameraData.finalHeight = parameters.finalHeight;
cameraData.viewCount = parameters.viewCount;
cameraData.enableExposureControl = parameters.commonData.enableExposureControl;
cameraData.lowResolution = true;
cameraData.enableIntegration = true;
UpdateShaderVariableslClouds(ref parameters.commonData.cloudsCB, hdCamera, settings, cameraData, cloudModelData, false);
// If this is a default camera, we want the improved blending, otherwise we don't (in the case of a planar)
parameters.commonData.cloudsCB._ImprovedTransmittanceBlend = parameters.commonData.cameraType == TVolumetricCloudsCameraType.Default ? 1 : 0;
parameters.commonData.cloudsCB._CubicTransmittance = parameters.commonData.cameraType == TVolumetricCloudsCameraType.Default && hdCamera.msaaEnabled ? 1 : 0;
return(parameters);
}
TextureHandle RenderVolumetricClouds_FullResolution(RenderGraph renderGraph, HDCamera hdCamera, TVolumetricCloudsCameraType cameraType, TextureHandle colorBuffer, TextureHandle depthPyramid, TextureHandle motionVectors, TextureHandle volumetricLighting, TextureHandle maxZMask)
{
using (var builder = renderGraph.AddRenderPass <VolumetricCloudsFullResolutionData>("Generating the rays for RTR", out var passData, ProfilingSampler.Get(HDProfileId.VolumetricClouds)))
{
builder.EnableAsyncCompute(false);
VolumetricClouds settings = hdCamera.volumeStack.GetComponent <VolumetricClouds>();
passData.parameters = PrepareVolumetricCloudsParameters_FullResolution(hdCamera, hdCamera.actualWidth, hdCamera.actualHeight, hdCamera.viewCount, hdCamera.exposureControlFS, settings, cameraType);
passData.colorBuffer = builder.ReadTexture(builder.WriteTexture(colorBuffer));
passData.depthPyramid = builder.ReadTexture(depthPyramid);
passData.maxZMask = settings.localClouds.value ? renderGraph.defaultResources.blackTextureXR : builder.ReadTexture(maxZMask);
passData.ambientProbeBuffer = builder.ReadComputeBuffer(renderGraph.ImportComputeBuffer(m_CloudsProbeBuffer));
passData.volumetricLighting = builder.ReadTexture(volumetricLighting);
passData.scatteringFallbackTexture = renderGraph.defaultResources.blackTexture3DXR;
passData.intermediateLightingBuffer = builder.CreateTransientTexture(new TextureDesc(Vector2.one, true, true)
{
colorFormat = GraphicsFormat.R16G16B16A16_SFloat, enableRandomWrite = true, name = "Temporary Clouds Lighting Buffer 0"
});
passData.intermediateBufferDepth = builder.CreateTransientTexture(new TextureDesc(Vector2.one, true, true)
{
colorFormat = GraphicsFormat.R32_SFloat, enableRandomWrite = true, name = "Temporary Clouds Depth Buffer 0"
});
passData.intermediateColorBufferCopy = passData.parameters.needExtraColorBufferCopy ? builder.CreateTransientTexture(new TextureDesc(Vector2.one, true, true)
{
colorFormat = GetColorBufferFormat(), enableRandomWrite = true, name = "Temporary Color Buffer"
}) : renderGraph.defaultResources.blackTextureXR;
if (passData.parameters.needsTemporaryBuffer)
{
passData.intermediateBufferUpscale = builder.CreateTransientTexture(new TextureDesc(Vector2.one, true, true)
{
colorFormat = GraphicsFormat.R16G16B16A16_SFloat, enableRandomWrite = true, name = "Temporary Clouds Upscaling Buffer"
});
}
else
{
passData.intermediateBufferUpscale = renderGraph.defaultResources.blackTexture;
}
builder.SetRenderFunc(
(VolumetricCloudsFullResolutionData data, RenderGraphContext ctx) =>
{
TraceVolumetricClouds_FullResolution(ctx.cmd, data.parameters, data.ambientProbeBuffer,
data.colorBuffer, data.depthPyramid, data.volumetricLighting, data.scatteringFallbackTexture, data.maxZMask,
data.intermediateLightingBuffer, data.intermediateBufferDepth,
data.intermediateColorBufferCopy, data.intermediateBufferUpscale);
});
// In the case of reflection probes, we don't expect any pass that will need the transmittance mask of the clouds so we return white.
return(renderGraph.defaultResources.whiteTextureXR);
}
}
VolumetricCloudsParameters_FullResolution PrepareVolumetricCloudsParameters_FullResolution(HDCamera hdCamera, int width, int height, int viewCount, bool exposureControl, VolumetricClouds settings, TVolumetricCloudsCameraType cameraType)
{
VolumetricCloudsParameters_FullResolution parameters = new VolumetricCloudsParameters_FullResolution();
// Compute the cloud model data
CloudModelData cloudModelData = GetCloudModelData(settings);
// Fill the common data
FillVolumetricCloudsCommonData(exposureControl, settings, cameraType, in cloudModelData, ref parameters.commonData);
// If this is a baked reflection, we run everything at full res
parameters.finalWidth = width;
parameters.finalHeight = height;
parameters.viewCount = viewCount;
// MSAA support
parameters.needsTemporaryBuffer = hdCamera.msaaEnabled;
parameters.cloudCombinePass = m_CloudCombinePass;
parameters.needExtraColorBufferCopy = (GetColorBufferFormat() == GraphicsFormat.B10G11R11_UFloatPack32 &&
// On PC and Metal, but not on console.
(SystemInfo.graphicsDeviceType == GraphicsDeviceType.Direct3D11 ||
SystemInfo.graphicsDeviceType == GraphicsDeviceType.Direct3D12 ||
SystemInfo.graphicsDeviceType == GraphicsDeviceType.Metal ||
SystemInfo.graphicsDeviceType == GraphicsDeviceType.Vulkan));
// In case of MSAA, we no longer require the preliminary copy as there is no longer a need for RW of the color buffer.
parameters.needExtraColorBufferCopy &= !parameters.needsTemporaryBuffer;
// Compute shader and kernels
parameters.renderKernel = m_CloudRenderKernel;
parameters.combineKernel = parameters.needExtraColorBufferCopy ? m_CombineCloudsKernelColorCopy : m_CombineCloudsKernelColorRW;
// Update the constant buffer
VolumetricCloudsCameraData cameraData;
cameraData.cameraType = parameters.commonData.cameraType;
cameraData.traceWidth = parameters.finalWidth;
cameraData.traceHeight = parameters.finalHeight;
cameraData.intermediateWidth = parameters.finalWidth;
cameraData.intermediateHeight = parameters.finalHeight;
cameraData.finalWidth = parameters.finalWidth;
cameraData.finalHeight = parameters.finalHeight;
cameraData.viewCount = parameters.viewCount;
cameraData.enableExposureControl = parameters.commonData.enableExposureControl;
cameraData.lowResolution = false;
cameraData.enableIntegration = true;
UpdateShaderVariableslClouds(ref parameters.commonData.cloudsCB, hdCamera, settings, cameraData, cloudModelData, false);
return(parameters);
}
VolumetricCloudsParameters_LowResolution PrepareVolumetricCloudsParameters_LowResolution(HDCamera hdCamera, int width, int height, int viewCount, bool exposureControl, VolumetricClouds settings, TVolumetricCloudsCameraType cameraType)
{
VolumetricCloudsParameters_LowResolution parameters = new VolumetricCloudsParameters_LowResolution();
// Compute the cloud model data
CloudModelData cloudModelData = GetCloudModelData(settings);
// Fill the common data
FillVolumetricCloudsCommonData(exposureControl, settings, cameraType, in cloudModelData, ref parameters.commonData);
// We need to make sure that the allocated size of the history buffers and the dispatch size are perfectly equal.
// The ideal approach would be to have a function for that returns the converted size from a viewport and texture size.
// but for now we do it like this.
// Final resolution at which the effect should be exported
parameters.finalWidth = width;
parameters.finalHeight = height;
// Intermediate resolution at which the effect is accumulated
parameters.intermediateWidth = Mathf.RoundToInt(0.5f * width);
parameters.intermediateHeight = Mathf.RoundToInt(0.5f * height);
// Resolution at which the effect is traced
parameters.traceWidth = Mathf.RoundToInt(0.25f * width);
parameters.traceHeight = Mathf.RoundToInt(0.25f * height);
parameters.viewCount = viewCount;
// MSAA support
parameters.needsTemporaryBuffer = hdCamera.msaaEnabled;
parameters.cloudCombinePass = m_CloudCombinePass;
parameters.needExtraColorBufferCopy = (GetColorBufferFormat() == GraphicsFormat.B10G11R11_UFloatPack32 &&
// On PC and Metal, but not on console.
(SystemInfo.graphicsDeviceType == GraphicsDeviceType.Direct3D11 ||
SystemInfo.graphicsDeviceType == GraphicsDeviceType.Direct3D12 ||
SystemInfo.graphicsDeviceType == GraphicsDeviceType.Metal ||
SystemInfo.graphicsDeviceType == GraphicsDeviceType.Vulkan));
// In case of MSAA, we no longer require the preliminary copy as there is no longer a need for RW of the color buffer.
parameters.needExtraColorBufferCopy &= !parameters.needsTemporaryBuffer;
// Compute shader and kernels
parameters.depthDownscaleKernel = m_CloudDownscaleDepthKernel;
parameters.renderKernel = m_CloudRenderKernel;
parameters.preUpscaleKernel = m_PreUpscaleCloudsKernel;
parameters.upscaleAndCombineKernel = parameters.needExtraColorBufferCopy ? m_UpscaleAndCombineCloudsKernelColorCopy : m_UpscaleAndCombineCloudsKernelColorRW;
// Update the constant buffer
VolumetricCloudsCameraData cameraData;
cameraData.cameraType = parameters.commonData.cameraType;
cameraData.traceWidth = parameters.traceWidth;
cameraData.traceHeight = parameters.traceHeight;
cameraData.intermediateWidth = parameters.intermediateWidth;
cameraData.intermediateHeight = parameters.intermediateHeight;
cameraData.finalWidth = parameters.finalWidth;
cameraData.finalHeight = parameters.finalHeight;
cameraData.viewCount = parameters.viewCount;
cameraData.enableExposureControl = parameters.commonData.enableExposureControl;
cameraData.lowResolution = true;
cameraData.enableIntegration = false;
UpdateShaderVariableslClouds(ref parameters.commonData.cloudsCB, hdCamera, settings, cameraData, cloudModelData, false);
return(parameters);
}