Streaming

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This section contains settings related to resource streaming.

Streaming settings

Streaming Settings

Free Space VRAM	The size of additionally reserved VRAM for allocations per frame, in bytes. Range of values: [0, INT_MAX]. The default value is : 512. Console access: render_streaming_free_space_vram (API control)
Free Space RAM	The size of additionally reserved RAM for allocations per frame, in bytes. Range of values: [0, INT_MAX]. The default value is : 1024. Console access: render_streaming_free_space_ram (API control)
Particles Memory Limit (%)	The cache memory limit for vertices of particle systems, in percentage of the total GPU memory. Notice Setting a too low limit for a huge number of particle systems in the scene may lead to rendering only some of them. Works only with the Vulkan graphics API. Range of values: [0, 100]. The default value is : 3. Console access: render_streaming_particles_memory_limit (API control)
VRAM Budget	The mode for determining the amount of available VRAM. The following modes are available: System - the available VRAM size is obtained from the operating system. Driver - the VRAM available for the application is determined by the video driver. Full GPU Memory - all VRAM is available for the application. One of the following values: System Driver (by default) Full GPU Memory Console access: render_streaming_vram_budget (API control)
VRAM Overcommit	The value indicating whether VRAM limits (both the usage limit and free space) are applied. disabled by default. Console access: render_streaming_vram_overcommit (API control)
Committed Memory Overcommit	The value indicating whether the Engine enforces committed memory usage limits. When disabled, the Engine enforces a memory usage cap (80% of committed system memory) to prevent crashes that may occur if the system lacks a pagefile, has insufficient disk space, or if the OS refuses to increase committed memory. When enabled (default), the Engine can use more than 80% of committed system memory. This may improve streaming performance - especially under high memory pressure (e.g., with browsers or other background apps running, or long system uptime), but it increases the risk of crashes if system resources are exhausted. Warning With overcommit enabled, crashes may affect not only the Engine but other running applications if system memory runs out. enabled by default. Console access: render_streaming_committed_memory_overcommit (API control)
Usage Limit VRAM	The percentage of the committed video memory available for streaming. If the streaming exceeds the VRAM usage limit, it will start using RAM for loading graphic resources. Range of values: [10, 100]. The default value is : 80. Console access: render_streaming_usage_limit_vram (API control)
Usage Limit RAM	The percentage of the committed memory available for streaming. If the streaming exceeds the RAM usage limit, the application will crash. Range of values: [10, 100]. The default value is : 80. Console access: render_streaming_usage_limit_ram (API control)
Cache VRAM	The maximum size of VRAM available for streaming caches. When set to -1, caches grow freely up to engine limits. When limited, caches will grow only up to the defined value. If the limit is too low, not all resources will fit into the cache in time, which may cause streaming to stutter. Range of values: [-1, inf]. The default value is : -1. Console access: render_streaming_cache_vram (API control)
Cache RAM	The maximum size of RAM available for streaming caches. When set to -1, caches grow freely up to engine limits. When limited, caches will grow only up to the defined value. If the limit is too low, not all resources will fit into the cache in time, which may cause streaming to stutter. Range of values: [-1, inf]. The default value is : -1. Console access: render_streaming_cache_ram (API control)
Animations Life Time	The lifetime of GPU cache used for animations rendering. Range of values: [-1, INT_MAX]. The default value is : -1. Console access: render_streaming_animations_life_time (API control)

Shaders#

Compile Mode	The compilation mode for shaders that are used in the loaded world. The following modes are available: Async - asynchronous shaders compilation. Force - forced compilation of shaders required for each frame at ones. Option #1 is selected by default (see above). Console access: render_shaders_compile_mode (API control)

Textures#

Streaming Mode	The streaming mode for textures. The following modes are available: Async - asynchronous loading of textures. Force - force-loading of textures required for each frame at ones. Option #1 is selected by default (see above). Console access: render_streaming_textures_mode (API control)
Mipmaps	The value indicating whether texture mipmap loading is enabled. disabled by default. Console access: render_streaming_textures_mipmaps (API control)
Mipmaps Density	The density of mipmaps relative to the screen resolution. This value helps to define which mipmap should be loaded at the current moment. You can specify different values for different quality presets. Range of values: [0.0f, 1000000.0f]. The default value is : 2.0f. Console access: render_streaming_textures_mipmaps_density (API control)

Meshes GPU#

Streaming Mode	The streaming mode for loading meshes to video memory (VRAM). The following modes are available: Async - asynchronous loading of meshes. Force - force-loading of meshes required for the current frame at once. Option #1 is selected by default (see above). Console access: render_streaming_meshes_mode_vram (API control)

Meshes CPU#

Streaming Mode	The streaming mode for loading meshes to memory (RAM). The following modes are available: Async - asychronous loading of meshes. Force - force-loading of meshes required for the current frame at once. Option #1 is selected by default (see above). Console access: render_streaming_meshes_mode_ram (API control)

Prefetch CPU#

Collision Mode	The mode of asynchronous pre-loading of meshes to memory before they are used. Pre-loading is available only for meshes, which have at least one surface with the Collision flag set. There are 2 modes of loading such meshes to RAM: Disable - loading is disabled. Radius - meshes within the prefetch radius are loaded. This method should be used when the Async streaming mode for meshes is set. Option #1 is selected by default (see above). Console access: render_streaming_meshes_prefetch_collision (API control)
Intersection Mode	The mode of asynchronous pre-loading of meshes into memory before they are used. Pre-loading is available only for meshes, which have at least one surface with the Intersection flag set. There are 2 modes of loading such meshes to RAM: Disable - loading is disabled. Radius - all meshes within the prefetch radius are loaded. This method should be used when the Async streaming mode for meshes is set. Option #1 is selected by default (see above). Console access: render_streaming_meshes_prefetch_intersection (API control)
Radius	The radius within which meshes are pre-loaded into memory. The value should exceed the physics radius (for collisions) and/or the radius within which intersections are calculated. Range of values: [0.0f, inf]. The default value is : 0.0f. Console access: render_streaming_meshes_prefetch_radius (API control)

_{The information on this page is valid for UNIGINE 2.20 SDK.}

Last update: 2025-07-10

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