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Keyword Type Units Description

System

time_to_first_pixel real seconds Time it take for the first pixel to appear.

network_traffic table

disk_traffic table

load_average

Wiki Markup
{real, real, real}

Profiling

timings table time Time taken to produce the image, for a wide range of timed categories.

memory_profile table M Memory used to produce the image, for a wide range of categories.

peak_virtual_memory real M

peak_resident real M

peak_from_malloc real M

system_time (real, real, real)

cpu_usage (real, real, real)

Netword Cache

cache_size real GB Total cache size.

used_size real GB Amount of space already used.

number_of_copied_files integer Total number of files copied to that cache during this rendering session

number_of_failed_copies integer Copies that failed for system reasons (space, permissions, etc ...)

number_of_copies_avoided integer Copies avoided because files already in cache

number_of_rejected_files integer Files not copied because cache is full

*number_of_copies_avoided_kb integer Kb Same as number_of_copies_avoided but in Kb.

data_not_cached integer Kb Data not cached due to lack of space.

data_copied integer Kb Total amount of data that has been copied to the cache during the rendering sessions.

Textures

number_of_maps integer Total number of maps (textures, shadow maps, deep shadow maps, etc ...) managed.

number_of_texture_maps integer

number_of_shadow_maps integer

number_of_deep_shadow_maps integer

number_of_invalid_maps integer

number_of_file_open_operations integer Total number of file open operations performed during a rendering session. Should be relatively low thanks to caching. Could be high on systems configured with not enough file descriptors.

*number_of_map_requests integer Total number of maps requested

texture_access_statistics table

texture_ids group List of texture ids needed to understand texture_access_statistics

Texture Cache

cache_size real GB Size of RAM texture cache.

cache_pressure real

cache_pressure_from_textures real

cache_pressure_from_misc real

footprint_of_textures real

footprint_of_misc G

Scene

number_of_objects integer Total number of high level objects passed to renderer.

number_of_attributes integer Number of RenderMan attributes needed to describe the scene.

number_of_transforms integer Number of transforms in the scene.

primitive_compression_ratio real While rendering, 3Delight uses a compression algorithm for geometric primitives residing in memory. This statistic indicates the compression ratio.

saved_memory real Mb Memory saved thanks to compression.

Reyes

number_of_mps integer Total number of micro polygons generated to produce the image.

average_mps_per_grid integer Average number of micro polygons per grid.

grids_projected integer

grids_shaded integer

grids_displaced integer

number_of_primitives integer Total number of low-level primitives.

number_of_rejected_primitives Total number of low-level primitives that have been efficiently rejected because they were are not seen in the image.

number_of_non_empty_buckets integer

average_items_per_bucket integer Average number of items (primitive, grid, particle, etc ...) in a bucket.

maximum_items_in_a_bucket integer Maximum items found in a single bucket.

distribution_of_micropolygon_area histogram An histogram representing the distribution of the area of micro-polygons. Distributions skewed towards lower values mean slower renders.

distribution_of_fragment_lists histogram Depth complexity.

number_of_trimming_operations integer

maximum_mp_area real

mininum_mp_area real

average_mp_area real

*curves_grouping_efficiency real

Ray Tracer

number_of_rays integer Total number of traced rays.

number_of_shader_calls integer Total number of shader calls.

travelled_distance real camera space units Total travelled distance for all traced rays.

number_of_arealight_probes integer Total number of ray probes for area light sampling.

average_objects_in_ray_path real Average number of objects any each ray crosses during scene traversal. Higher values lead to slower render. Values close to a hundred can be seen when rendering fur or hair.

number_of_patch_intersection_tests integer Total count of intersection tests with the lowest level geometrical primitives in 3Delight.

space_partition_efficiency real Proportion of rays hitting an object after they enter a space partition leaf.

bounding_volume_efficiency real Proportion of rays hitting an objects they they enter objet's bounding volume.

average_ray_packet_size real

approximations real Percentage of intersection tests that used geometric approximations.

cache_pressure real Pressure on displaced geometry cache.

distribution_of_ray_depth histogram

distribution_of_shading_groups histogram Represents the distribution of shading group sizes. Histograms skewed to lower values represent less efficient shading.

distribution_of_ray_types table A table describing how many rays were traced, per type (specular, diffuse, transmission, ...). Note that this is a table, not an histogram.

distribution_of_shader_calls

table

Describes how many shader calls were performed, per ray type.

bbox_intersections (real, integer) ( bounding box intersection per ray, total bbox intersection )

Point Based Subsurface Scattering

distribution_of_lookup_depth histogram An histogram representing the lookup depth in the hierarchical structure used to store the point-based scene representation. Histograms skewed to lower values mean faster renders. A technical statistic that is not really telling for an artist.

Space Partitioner

number_of_nodes integer Total number of nodes (internal and leafs) in the space partitioner.

motion_density real

motion_segments integer

tree_depth integer Maximum leaf node depth in the space partitioner.

number_of_rays integer Total number of rays that went through the space partitioner.

average_leafs_per_ray real Average number of leaves a ray encounters during tress traversal.

average_internal_nodes_per_ray real Average number internal nodes a ray encounters during tree traversal.

*average_depth_per_leaf real

average_objects_per_leaf real

average_packet_size_at_root real Ray packet size when packet is entering the root of the tree

average_packet_size_at_leaf real Ray packet size when packet is entering a leaf of the tree

number_of_bbox_intersections integer

number_of_bbox_intersections_per_ray real

Point-Based Global Illumination

number_of_queries integer Total number of lookups in the point-based representation of the scene.

number_of_elements_per_query real Average number of elements considered for each query. Higher numbers usually indicate slower queries/renders.

Point-Based Subsurface Scattering

number_of_nodes integer Total number of nodes (internal and leaf) in data structure (tree) used for point-based subsurface scattering.

tree_depth integer

number_of_queries integer

number_of_leaf_computations integer Number of subsurface computation performed using the leafs of the tree.

number_of_hierarchical_computations integer Number of subsurface computation performed using higher (aggregate) tree levels. Using such aggregate computations accelerate overall render time.

minimum_visited_leafs_per_query integer

maximum_visited_leafs_per_query integer

average_visited_leafs_per_query integer

Photon Maps

number_of_photons integer Total number of traced photons.

number_of_interactions integer Total number of photon/surface interactions.

number_of_global_photons integer Number of photons stored in global photon maps.

number_of_caustic_photons integer Numbe of photons stored in caustic photon maps.

average_bounces real Average number of bounces a photon does before terminating or exiting scene.

average_diffuse_depth real Average depth of photons stored in the global photon map.

average_caustics_depth real Average depth if photons stored in the specular photon map.

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