- Radeon ProRender SDK
- Downloading and Getting Started
- How to Use RPR SDK
- Data Types
- Data Structs
- Info and Setting Types
- rpr_aa_filter
- rpr_aov
- rpr_api_version
- rpr_bool
- rpr_buffer_element_type
- rpr_buffer_info
- rpr_camera_info
- rpr_camera_mode
- rpr_color_space
- rpr_component_type
- rpr_composite_info
- rpr_composite_type
- rpr_context_info
- rpr_context_sampler_type
- rpr_context_properties
- rpr_creation_flags
- rpr_curve_parameter
- rpr_environment_override
- rpr_framebuffer_info
- rpr_grid_indices_topology
- rpr_grid_parameter
- rpr_hetero_volume_filter
- rpr_hetero_volume_indices_topology
- rpr_hetero_volume_parameter
- rpr_image_filter_type
- rpr_image_info
- rpr_image_wrap_type
- rpr_instance_info
- rpr_light_info
- rpr_light_type
- rpr_lut_info
- rpr_material_node_arithmetic_operation
- rpr_material_node_info
- rpr_material_node_input
- rpr_material_node_input_info
- rpr_material_node_input_type
- rpr_material_node_lookup_value
- rpr_material_node_transform_op
- rpr_material_node_type
- rpr_material_node_uvtype_value
- rpr_material_system_info
- rpr_mesh_info
- rpr_object_info
- rpr_parameter_info
- rpr_parameter_type
- rpr_post_effect_info
- rpr_post_effect_type
- rpr_render_mode
- rpr_scene_info
- rpr_shape_info
- rpr_shape_type
- rpr_status
- rpr_subdiv_boundary_interfop_type
- rpr_tonemapping_operator
- rpr_ubermaterial_emission_mode
- rpr_ubermaterial_ior_mode
- rpr_volume_type
- Shaders
- rpr_material_node_add
- rpr_material_node_ao_map
- rpr_material_node_arithmetic
- rpr_material_node_blend
- rpr_material_node_blend_value
- rpr_material_node_buffer_sampler
- rpr_material_node_bump_map
- rpr_material_node_checker_texture
- rpr_material_node_constant_texture
- rpr_material_node_diffuse
- rpr_material_node_diffuse_refraction
- rpr_material_node_dot_texture
- rpr_material_node_emissive
- rpr_material_node_fresnel
- rpr_material_node_fresnel_schlick
- rpr_material_node_gradient_texture
- rpr_material_node_image_texture
- rpr_material_node_input_lookup
- rpr_material_node_microfacet
- rpr_material_node_microfacet_anisotropic_reflection
- rpr_material_node_microfacet_anisotropic_refraction
- rpr_material_node_microfacet_beckmann
- rpr_material_node_microfacet_refraction
- rpr_material_node_noise2d_texture
- rpr_material_node_normal_map
- rpr_material_node_orennayar
- rpr_material_node_passthrough
- rpr_material_node_phong
- rpr_material_node_reflection
- rpr_material_node_refraction
- rpr_material_node_transparent
- rpr_material_node_twosided
- rpr_material_node_uv_procedural
- rpr_material_node_uv_triplanar
- rpr_material_node_volume
- rpr_material_node_ward
- Tutorials
- Basic Scene Demo
- Context Creation
- Scene Creation
- Camera Setup
- Mesh Creation
- Instance Creation
- Deformation Motion Blur
- Point Light Creation
- Emissive Shape Creation
- Environment Light Creation
- Textured Material Creation
- Materials Demo
- Uber Material Creation
- SSS Uber Material Creation
- Two Sided Materials
- Tiled Rendering
- AOVs Setting
- Framebuffer Access
- OpenGL Interop
- Gamma Post Process Effect
- Curve Creation
- Import/Export
- Shadow Catcher
- Adaptive Sampling
- Tracing
- Parameters Enumeration
- Volume
- Hybrid
- Mesh Obj
- API Reference
- rprBufferGetInfo
- rprCameraGetInfo
- rprCameraLookAt
- rprCameraSetAngularMotion
- rprCameraSetApertureBlades
- rprCameraSetExposure
- rprCameraSetFarPlane
- rprCameraSetFocalLength
- rprCameraSetFocalTilt
- rprCameraSetFocusDistance
- rprCameraSetFStop
- rprCameraSetIPD
- rprCameraSetLensShift
- rprCameraSetLinearMotion
- rprCameraSetMode
- rprCameraSetNearPlane
- rprCameraSetOrthoHeight
- rprCameraSetOrthoWidth
- rprCameraSetSensorSize
- rprCameraSetTiltCorrection
- rprCameraSetTransform
- rprCompositeCompute
- rprCompositeGetInfo
- rprCompositeSetInput1u
- rprCompositeSetInput4f
- rprCompositeSetInputC
- rprCompositeSetInputFb
- rprCompositeSetInputLUT
- rprCompositeSetInputOp
- rprContextAbortRender
- rprContextAttachPostEffect
- rprContextAttachRenderLayer
- rprContextClearMemory
- rprContextCreateBuffer
- rprContextCreateCamera
- rprContextCreateComposite
- rprContextCreateCurve
- rprContextCreateDirectionalLight
- rprContextCreateDiskLight
- rprContextCreateEnvironmentLight
- rprContextCreateFrameBuffer
- rprContextCreateFramebufferFromGLTexture2D
- rprContextCreateGrid
- rprContextCreateHeteroVolume
- rprContextCreateIESLight
- rprContextCreateImage
- rprContextCreateImageFromFile
- rprContextCreateImageFromFileMemory
- rprContextCreateInstance
- rprContextCreateLUTFromData
- rprContextCreateLUTFromFile
- rprContextCreateMaterialSystem
- rprContextCreateMesh
- rprContextCreateMeshEx
- rprContextCreateMeshEx2
- rprContextCreatePointLight
- rprContextCreatePostEffect
- rprContextCreateScene
- rprContextCreateSkyLight
- rprContextCreateSphereLight
- rprContextCreateSpotLight
- rprContextDetachPostEffect
- rprContextDetachRenderLayer
- rprContextGetAOV
- rprContextGetAttachedPostEffect
- rprContextGetAttachedPostEffectCount
- rprContextGetInfo
- rprContextGetParameterInfo
- rprContextGetScene
- rprContextRender
- rprContextRenderTile
- rprContextResolveFrameBuffer
- rprContextSetActivePlugin
- rprContextSetAOV
- rprContextSetAOVindexLookup
- rprContextSetAOVindicesLookup
- rprContextSetParameterByKey1f
- rprContextSetParameterByKey1u
- rprContextSetParameterByKey3f
- rprContextSetParameterByKey4f
- rprContextSetParameterByKeyPtr
- rprContextSetParameterByKeyString
- rprContextSetParameterString
- rprContextSetScene
- rprCreateContext
- rprCurveGetInfo
- rprCurveSetMaterial
- rprCurveSetTransform
- rprCurveSetVisibility
- rprCurveSetVisibilityFlag
- rprDirectionalLightSetRadiantPower3f
- rprDirectionalLightSetShadowSoftnessAngle
- rprDiskLightSetAngle
- rprDiskLightSetRadiantPower3f
- rprDiskLightSetRadius
- rprEnvironmentLightAttachPortal
- rprEnvironmentLightDetachPortal
- rprEnvironmentLightGetEnvironmentLightOverride
- rprEnvironmentLightSetEnvironmentLightOverride
- rprEnvironmentLightSetImage
- rprEnvironmentLightSetIntensityScale
- rprFrameBufferClear
- rprFrameBufferFillWithColor
- rprFrameBufferGetInfo
- rprFrameBufferSaveToFile
- rprFrameBufferSaveToFileEx
- rprFrameBufferSetLPE
- rprGridGetInfo
- rprHeteroVolumeGetInfo
- rprHeteroVolumeSetAlbedo
- rprHeteroVolumeSetAlbedoGrid
- rprHeteroVolumeSetAlbedoLookup
- rprHeteroVolumeSetAlbedoScale
- rprHeteroVolumeSetDensityGrid
- rprHeteroVolumeSetDensityLookup
- rprHeteroVolumeSetDensityScale
- rprHeteroVolumeSetEmission
- rprHeteroVolumeSetEmissionGrid
- rprHeteroVolumeSetEmissionLookup
- rprHeteroVolumeSetEmissionScale
- rprHeteroVolumeSetFilter
- rprHeteroVolumeSetTransform
- rprIESLightSetImageFromFile
- rprIESLightSetImageFromIESdata
- rprIESLightSetRadiantPower3f
- rprImageGetInfo
- rprImageSetFilter
- rprImageSetGamma
- rprImageSetInternalCompression
- rprImageSetMipmapEnabled
- rprImageSetOcioColorspace
- rprImageSetUDIM
- rprImageSetWrap
- rprInstanceGetBaseShape
- rprLightGetInfo
- rprLightSetGroupId
- rprLightSetTransform
- rprMaterialNodeGetInfo
- rprMaterialNodeGetInputInfo
- rprMaterialNodeSetID
- rprMaterialNodeSetInputBufferDataByKey
- rprMaterialNodeSetInputFByKey
- rprMaterialNodeSetInputImageDataByKey
- rprMaterialNodeSetInputNByKey
- rprMaterialNodeSetInputUByKey
- rprMaterialSystemCreateNode
- rprMaterialSystemGetInfo
- rprMaterialSystemGetSize
- rprMeshGetInfo
- rprObjectDelete
- rprObjectSetName
- rprPointLightSetRadiantPower3f
- rprPostEffectGetInfo
- rprPostEffectSetParameter1f
- rprPostEffectSetParameter1u
- rprPostEffectSetParameter3f
- rprPostEffectSetParameter4f
- rprRegisterPlugin
- rprSceneAttachCurve
- rprSceneAttachHeteroVolume
- rprSceneAttachLight
- rprSceneAttachShape
- rprSceneClear
- rprSceneDetachCurve
- rprSceneDetachHeteroVolume
- rprSceneDetachLight
- rprSceneDetachShape
- rprSceneGetBackgroundImage
- rprSceneGetCamera
- rprSceneGetCameraRight
- rprSceneGetEnvironmentLight
- rprSceneGetInfo
- rprSceneSetBackgroundImage
- rprSceneSetCamera
- rprSceneSetCameraRight
- rprSceneSetEnvironmentLight
- rprShapeAttachRenderLayer
- rprShapeAutoAdaptSubdivisionFactor
- rprShapeDetachRenderLayer
- rprShapeGetInfo
- rprShapeMarkStatic
- rprShapeSetAngularMotion
- rprShapeSetContourIgnore
- rprShapeSetDisplacementMaterial
- rprShapeSetDisplacementScale
- rprShapeSetHeteroVolume
- rprShapeSetLayerMask
- rprShapeSetLightGroupID
- rprShapeSetLinearMotion
- rprShapeSetMaterial
- rprShapeSetMaterialFaces
- rprShapeSetMotionTransform
- rprShapeSetMotionTransformCount
- rprShapeSetObjectGroupID
- rprShapeSetObjectID
- rprShapeSetScaleMotion
- rprShapeSetReflectionCatcher
- rprShapeSetShadowCatcher
- rprShapeSetSubdivisionAutoRatioCap
- rprShapeSetSubdivisionBoundaryInterop
- rprShapeSetSubdivisionCreaseWeight
- rprShapeSetSubdivisionFactor
- rprShapeSetTransform
- rprShapeSetVertexValue
- rprShapeSetVisibility
- rprShapeSetVisibilityFlag
- rprShapeSetVisibilityInSpecular
- rprShapeSetVolumeMaterial
- rprSkyLightAttachPortal
- rprSkyLightDetachPortal
- rprSkyLightSetAlbedo
- rprSkyLightSetDirection
- rprSkyLightSetScale
- rprSkyLightSetTurbidity
- rprSphereLightSetRadiantPower3f
- rprSphereLightSetRadius
- rprSpotLightSetConeShape
- rprSpotLightSetImage
- rprSpotLightSetRadiantPower3f
- Transitioning from RPR 1.X to 2.0
- Radeon Image Filters
- Basic Example
- Filters
- ACES filmic tone mapping filter
- AI custom model filter
- AI denoiser filter
- AI upscale filter
- Auto linear tone mapping filter
- BGRA TO RGBA conversion filter
- Bilateral denoiser filter
- Binary operation filter
- Bloom filter
- Color space changing filter
- Convert filter
- Depth of field filter
- Dilate (erode) filter
- Drago tone mapping filter
- Dynamic resampling filter
- Edge-avoiding À-Trous wavelet filter
- Emboss filter
- Exponential tone mapping filter
- Filmic uncharted tone mapping filter
- Gamma correction filter
- Gaussian blurring filter
- Horizontal flip filter
- Hue-saturation changing filter
- Laplace edge detection filter
- Linear photographic tone mapping filter
- Linear tone mapping filter
- Local weighted regression filter
- Max-white tone mapping filter
- Median denoiser filter
- Morphological antialiasing filter
- Motion blur filter
- Motion buffer filter
- Multiplication filter
- NDC depth filter
- Photographic tone mapping filter
- Posterization filter
- Range remap filter
- Reinhard tone mapping filter
- Resampling filter
- RGB noise filter
- Rotation filter
- Sharpen filter
- Sobel edge detection filter
- Spread filter
- Temporal accumulation filter
- User defined filter
- Vertical flip filter
- Weighted sum filter
- Combining Filters
- Data Types
- Data Structs
- Info and Setting Types
- API Reference
- rifCommandQueueAttachImageFilter
- rifCommandQueueAttachImageFilterRect
- rifCommandQueueDetachImageFilter
- rifContextCreateCommandQueue
- rifContextCreateImage
- rifContextCreateImageFilter
- rifContextCreateImageFromDirectX11Buffer
- rifContextCreateImageFromDirectX11Texture
- rifContextCreateImageFromDirectX12Memory
- rifContextCreateImageFromMetalMemory
- rifContextCreateImageFromOpenClMemory
- rifContextCreateImageFromOpenGlTexture
- rifContextExecuteCommandQueue
- rifContextGetDeviceInfo
- rifContextGetInfo
- rifContextSetInfo
- rifCreateContext
- rifCreateContextFromDirectX12Context
- rifCreateContextFromMetalContext
- rifCreateContextFromOpenClContext
- rifCreateOpenCLContextSharedWithDirectX11
- rifFlushQueue
- rifGetDeviceCount
- rifGetErrorCodeDescription
- rifGetErrorCodeString
- rifGetLastErrorMessage
- rifImageFilterClearParameterImage
- rifImageFilterGetInfo
- rifImageFilterSetComputeType
- rifImageFilterSetParameter1f
- rifImageFilterSetParameter1i
- rifImageFilterSetParameter1u
- rifImageFilterSetParameter2f
- rifImageFilterSetParameter2i
- rifImageFilterSetParameter2u
- rifImageFilterSetParameter3f
- rifImageFilterSetParameter3i
- rifImageFilterSetParameter3u
- rifImageFilterSetParameter4f
- rifImageFilterSetParameter4i
- rifImageFilterSetParameter4u
- rifImageFilterSetParameter8f
- rifImageFilterSetParameter8i
- rifImageFilterSetParameter8u
- rifImageFilterSetParameter16f
- rifImageFilterSetParameter16i
- rifImageFilterSetParameter16u
- rifImageFilterSetParameterFloatArray
- rifImageFilterSetParameterImage
- rifImageFilterSetParameterImageArray
- rifImageFilterSetParameterString
- rifImageGetInfo
- rifImageMap
- rifImageUnmap
- rifObjectDelete
- rifParameterGetInfo
- rifSyncronizeQueue
- Tracing
- Radeon Machine Learning
- Examples
- Data Types
- Data Structs
- rml_context
- rml_context_params
- rml_graph
- rml_memory_info
- rml_model
- rml_op
- rml_op_batch_norm_params
- rml_op_bias_add_params
- rml_op_binary_params
- rml_op_cast_params
- rml_op_celu_params
- rml_op_clip_params
- rml_op_concat_params
- rml_op_const_params
- rml_op_conv_2d_params
- rml_op_conv_2d_transpose_params
- rml_op_desc
- rml_op_depth_to_space_params
- rml_op_elu_params
- rml_op_flatten_params
- rml_op_gemm_params
- rml_op_leaky_relu_params
- rml_op_local_response_norm_params
- rml_op_pad_params
- rml_op_placeholder_params
- rml_op_pool_2d_params
- rml_op_pool_2d_global_params
- rml_op_port_params
- rml_op_pow_params
- rml_op_quantize_linear_params
- rml_op_reduce_params
- rml_op_resize_2d_params
- rml_op_reshape_params
- rml_op_round_params
- rml_op_selu_params
- rml_op_slice_params
- rml_op_space_to_depth_params
- rml_op_squeeze_params
- rml_op_stack_params
- rml_op_thresholded_relu_params
- rml_op_top_k_params
- rml_op_transpose_params
- rml_op_unary_params
- rml_op_unsqueeze_params
- rml_size_2d
- rml_strings
- rml_tensor
- rml_tensor_info
- Info and Setting Types
- API Reference
- rmlConnectGraphs
- rmlCreateContextFromClQueue
- rmlCreateContextFromD3DQueue
- rmlCreateContextFromMTLQueue
- rmlCreateDefaultContext
- rmlCreateGraph
- rmlCreateModelFromGraph
- rmlCreateOperation
- rmlCreateTensor
- rmlCreateTensorFromClBuffer
- rmlCreateTensorFromD3DResource
- rmlCreateTensorFromMTLBuffer
- rmlGetClBufferFromTensor
- rmlGetD3DResourceFromTensor
- rmlGetGraphInputNames
- rmlGetGraphOutputNames
- rmlGetLastError
- rmlGetMTLBufferFromTensor
- rmlGetModelInputInfo
- rmlGetModelMemoryInfo
- rmlGetModelOutputInfo
- rmlGetTensorInfo
- rmlInfer
- rmlLoadGraph
- rmlLoadGraphFromBuffer
- rmlLoadGraphFromFile
- rmlMapTensor
- rmlPrepareModel
- rmlReleaseContext
- rmlReleaseGraph
- rmlReleaseModel
- rmlReleaseTensor
- rmlResetModelStates
- rmlSetD3DCommandList
- rmlSetDMLFloat16Allowed
- rmlSetLoggingEnabled
- rmlSetMIOpenAutoTuningOn
- rmlSetModelInput
- rmlSetModelInputInfo
- rmlSetModelOutput
- rmlSetModelOutputNames
- rmlSetNumD3DCommandLists
- rmlUnmapTensor
- RadeonRays
- Examples
- Data Types
- Data Structs
- Info and Setting Types
- API Reference
- rrAllocateAccelerationStructureDevicePtr
- rrAllocateCommandStream
- rrAllocateDeviceBuffer
- rrCmdBuildGeometry
- rrCmdBuildScene
- rrCmdIntersect
- rrCreateContext
- rrCreateContextDX
- rrCreateContextMTL
- rrCreateContextVk
- rrCreateGroupMPS
- rrDestroyContext
- rrGetCommandStreamFromD3D12CommandList
- rrGetCommandStreamFromMTLCommandBuffer
- rrGetCommandStreamFromVkCommandBuffer
- rrGetDevicePtrFromBuffer
- rrGetDevicePtrFromD3D12Resource
- rrGetDevicePtrFromMTLResource
- rrGetDevicePtrFromVkBuffer
- rrGetGeometryBuildMemoryRequirements
- rrGetSceneBuildMemoryRequirements
- rrGetTraceMemoryRequirements
- rrMapDevicePtr
- rrReleaseCommandStream
- rrReleaseDevicePtr
- rrReleaseEvent
- rrReleaseExternalCommandStream
- rrSetLogFile
- rrSetLogLevel
- rrSubmitCommandStream
- rrUnmapDevicePtr
- rrWaitEvent
- Uber Shader
- Radeon ProRender Plug-ins
- Material Library
- Blender
- Maya
- 3ds Max
- Unreal Engine
- Houdini
- Inventor
- USD Hydra Delegate
Common Light Properties¶
There are several basic light properties common for point, sun, spot and area light types.
Light Group¶
Light sources can be included into one of the two global light groups — key lights and fill lights.
- Key lights serve as major light sources in the composition, and are used to illuminate most objects in the scene and define their overall color.
- Fill lights are the secondary light sources that contribute to the scene lighting and illuminate shaded areas created by fill lights.
Lighting information for each group is stored into its own render pass — Key Lighting or Fill Lighting. Distinguishing between key and fill lights can help you evaluate how lights within each group contribute to the scene illumination, and can be particularly useful for complex setups with multiple light sources.
This also allows compositing of lighting of the two groups separately and editing lighting in post processing separately.
![]() Combined light |
![]() Key light |
![]() Fill light |
Light Intensity and Color¶
The light intensity and color parameters allow you to set the values and units to accurately match real-world light properties.
Units¶
The Units parameter defines the units to be used to measure the light intensity. The selection of units depends on the light type.
- Watts — the light intensity is measured in Watts, and does not depend on the area of the illuminated surface.
- Lumen — the light intensity is measured in Lumens, and does not depend on the area of the illuminated surface.
- Radiance — the light intensity is measured in Watts per square meter, and depends on the area of the illuminated surface.
- Luminance — the light intensity is measured in Lumen per square meter, and depends on the area of the illuminated surface.
- Default — the light power is measured in standard light units in Blender. For details, see the Blender documentation. This option can ease the conversion of scenes initially created using other Blender render engines into AMD Radeon ProRender.
Luminous Efficacy¶
The Luminous Efficacy parameter describes how well a light source produces visible light, and is measured in Lumens per Watt. In physics terms, this is the luminous flux produced by the source divided by the input power. This value should be specified if the intensity units are set to Watts or Radiance.
The default luminous efficacy is 17, which corresponds to a tungsten incandescent light bulb. The maximum luminous efficacy (MLE) is 683 lumens per Watt, which can be achieved for an ideal monochromatic source emitting at 555 nm ― the wavelength at which the human eye has maximum sensitivity. In practice, the MLE cannot be achieved: if it could, it would mean that every Watt of physical radiant power could be converted loss-free into visible light.
All light sources convert power into radiant energy and heat in various proportions. Their luminous efficacy depends on where they fall in the spectrum. Incandescent light bulbs emit mainly IR, with a small amount of visible light. Fluorescent and metal-halide sources convert a higher proportion of their energy into visible light, but also emit IR, UV, and heat. LEDs generate little or no IR or UV and little heat, and therefore convert more power into visible light. White LEDs emit primarily in the part of the spectrum to which the human eye has its maximum sensitivity, thus achieving the highest luminous efficacy of all white light sources, of up to 150 lm/W, with the theoretical limit being 260–300 lm/W.
To find out the physically correct values for real-world light sources, use luminous efficacy tables or calculators available on the web.
![]() Incandescent light: 17 lm/W |
![]() Fluorescent light: 75 lm/W |
![]() LED light: 100 lm/W |
Intensity¶
The Intensity parameter controls the intensity of the illumination in the specified units. The parameter describes the overall brightness of the light source, and supports values equal or greater than 0 (where 0 stands for no light).
![]() Light intensity: 10 |
![]() Light intensity: 50 |
![]() Light intensity: 100 |
Intensity Normalization¶
The Intensity Normalization parameter applies to scalable light sources (area lights). With normalization enabled, the area of the light source is taken into account to calculate the light intensity, and the total amount of emitted light does not change as you scale the light source. With intensity normalization disabled, the amount of light emitted is proportional to the surface area of the light source.
Intensity normalization gives more artistic control over the scene as it allows you to change the size of the reflections produced by the area light surfaces.
![]() Normalization off |
![]() Normalization on |
Color¶
The Color parameter controls the base color of the emitted light. The light color is multiplied by the intensity value: greater intensity values result in brighter colors.

Use Temperature¶
The Use Temperature parameter controls whether the light color will be affected by the temperature value.
Temperature¶
The Temperature parameter simulates the color temperature (in units of Kelvin) — a characteristic of visible light emitted from a blackbody that is heated to a certain temperature. In render, the temperature gives a tint that contributes to the color of the emitted light. You can think of this tint as a filter in front of the base light color.
Supported temperature values are 1000 to 40000. Smaller values produce a warmer red and yellow tint, while greater values give cool bluish tint. Normal light bulbs are between 2700-5500K.
The light temperature property is easily animated, and can be used for smooth color change transitions.
