VRAD (Source 2): Difference between revisions
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Bug:Systems with the latest NVIDIA (and possibly AMD) drivers may have issues with VRAD3, causing it to crash (with VK_ERROR_DEVICE_LOST) while baking lighting during map compilation. (tested in: 
)
Note:VRAD3 in all Source 2 games before Counter-Strike 2 are CPU-only. After Counter-Strike 2, VRAD requires GPU with ray-tracing support.
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{{vrads2|4|nt=3}} (and its predecessor, {{vrads2|3|nt=2}}) is the [[command-line]] tool that calculates and embeds lighting data into compiled maps, using a graphics card (GPU) with ray tracing support (or CPU on older engine versions). It is the {{source2|4}} counterpart of {{source|4|nt=3}}'s [[VRAD]], and like Source 1, VRAD3's static and pre-compiled light is bounced around the world with a {{Wikipedia|Radiosity (3D computer graphics)|radiosity}} algorithm. | |||
Source 2 originally ships with '''VRAD2''', which are used in earlier Source 2 titles such as {{hla|4}} and {{Svrh|4}}. VRAD2 are still shipped with some older Source 2 games to preview baked lighting in Hammer using CPU. | |||
'''VRAD3''' was later shipped with all Source 2 games, including older Source 2 titles that are still being supported. {{cs2|1}} ships with newer version of VRAD3 which requires a GPU with ray tracing support, such as NVIDIA RTX series, AMD RX 6000 series (or later/other RDNA2) cards or Intel Arc (since Jan 2025) graphics cards, while VRAD2 and the old CPU lighting compiler have been removed in {{cs2|name}} as of the Armory Update. | |||
{{Bug|tested={{cs2}}|Systems with the latest NVIDIA (and possibly AMD) drivers may have issues with VRAD3, causing it to crash (with {{code|VK_ERROR_DEVICE_LOST}}) while baking lighting during map compilation.}} | |||
{{Note|VRAD3 in all Source 2 games before {{cs2|1}} are CPU-only. After {{Cs2|1}}, VRAD requires GPU with ray-tracing support.}} | |||
== Games with VRAD2 == | == Games with VRAD2 == | ||
* All {{src2|4}} games except {{Cs2|4}}, and newer versions of {{Dota2|4}} (since 2023/2024). | * All {{src2|4}} games except {{Cs2|4}}, and newer versions of {{Dota2|4}} (since 2023/2024). | ||
| Line 23: | Line 18: | ||
* {{cs2|4}} | * {{cs2|4}} | ||
* {{Dota2|4}} (later version) | * {{Dota2|4}} (later version) | ||
* {{hla|4}} | * {{hla|4}} | ||
* {{Svrh|4}} (later version) | * {{Svrh|4}} (later version) | ||
=== Third-party === | === Third-party === | ||
| Line 46: | Line 41: | ||
*[[QRAD]] - {{gldsrc|4}} counterpart. | *[[QRAD]] - {{gldsrc|4}} counterpart. | ||
{{SDKTools/source2}} | {{SDKTools/source2}} | ||
{{source 2 topicon}} | |||
[[Category:Tools]] | |||
[[Category:Source 2 compilers]] | |||
[[Category:Level Design]] | [[Category:Level Design]] | ||
[[Category:RAD]] | |||
Latest revision as of 06:24, 28 July 2025
VRAD3 (and its predecessor, VRAD2) is the command-line tool that calculates and embeds lighting data into compiled maps, using a graphics card (GPU) with ray tracing support (or CPU on older engine versions). It is the 
Source 2 counterpart of 
Source 1's VRAD, and like Source 1, VRAD3's static and pre-compiled light is bounced around the world with a 
radiosity algorithm.
Source 2 originally ships with VRAD2, which are used in earlier Source 2 titles such as 
Half-Life: Alyx and 
SteamVR Home. VRAD2 are still shipped with some older Source 2 games to preview baked lighting in Hammer using CPU.
VRAD3 was later shipped with all Source 2 games, including older Source 2 titles that are still being supported. Counter-Strike 2 ships with newer version of VRAD3 which requires a GPU with ray tracing support, such as NVIDIA RTX series, AMD RX 6000 series (or later/other RDNA2) cards or Intel Arc (since Jan 2025) graphics cards, while VRAD2 and the old CPU lighting compiler have been removed in Counter-Strike 2 as of the Armory Update.
Bug:Systems with the latest NVIDIA (and possibly AMD) drivers may have issues with VRAD3, causing it to crash (with VK_ERROR_DEVICE_LOST) while baking lighting during map compilation. (tested in: )Note:VRAD3 in all Source 2 games before Counter-Strike 2 are CPU-only. After Counter-Strike 2, VRAD requires GPU with ray-tracing support.Games with VRAD2
- All Source 2 games except Counter-Strike 2, and newer versions of
Dota 2 (since 2023/2024).
Games with VRAD3
Valve
- Counter-Strike 2
- Dota 2 (later version)
- Half-Life: Alyx
- SteamVR Home (later version)
Third-party
Todo: Add more information about Source 2's VRAD2/VRAD3 lighting.
Command line options
Todo: List more command line options.
VRAD2
[Todo]
VRAD3
| Argument | Description |
|---|---|
| -script | Specify VRAD3 script file. |
See also
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