Raspberry Pi 4’s V3D graphics driver has moved beyond the “coming soon” stage described in older reports: Mesa now documents V3D as conformant with OpenGL ES 3.1, the API version associated with compute shaders. Geometry shaders were a separate development milestone, reported as entering Mesa 20.0 development for OpenGL ES 3.2 in December 2019. What an individual Pi 4 can use today still depends on its Mesa version, graphics configuration and the API requested by its application.
What the original announcement meant
The headline refers to development work on Raspberry Pi 4’s open-source V3D graphics stack, not a new hardware release or a feature that was still pending in 2026. The Raspberry Pi 4 uses Broadcom V3D 4.2 graphics hardware. Mesa’s V3D driver communicates with the V3D kernel DRM driver for GPU command scheduling; on Pi 4, VC4 DRM also handles display support, with Mesa kmsro helpers managing buffers between the display and rendering drivers. Mesa’s V3D driver documentation describes this arrangement.
The project’s focus on OpenGL ES reflected a difference between the APIs’ requirements, rather than a claim that the GPU lacked useful graphics capabilities. In the original report, Igalia developer Iago Toral explained: “The VideoCore-VI GPU can do OpenGL ES 3.2, but it can’t do OpenGL 3.0,” referring to the distinction between OpenGL ES and desktop OpenGL. Hackster.io’s report said the stated desktop OpenGL 3.0 render-target requirement was outside the project’s scope for the VideoCore-VI.
Compute shaders and geometry shaders are different milestones
Compute shaders: OpenGL ES 3.1
Compute shaders are part of OpenGL ES 3.1. Mesa’s current V3D documentation describes the driver as conformant to GLES 3.1, so the historical story about V3D nearing compute-shader support should not be read as a current announcement that the capability is still on its way. Conformance describes the driver; it does not by itself confirm which API version a particular installed operating-system image exposes to an application. Mesa V3D documentation
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Geometry shaders: reported for OpenGL ES 3.2
Geometry shaders were a later and distinct feature target. Phoronix reported in December 2019 that geometry shader support had entered Mesa 20.0 development for OpenGL ES 3.2. That is a dated development milestone, not a promise that every Pi 4 setup—including current or older Raspberry Pi OS images—exposes GLES 3.2 geometry shaders. Phoronix’s December 2019 report
Why your Pi 4 may expose different features
The board model alone does not determine the graphics API available to an application. Mesa’s general GLES documentation notes that individual drivers may expose a lower subset than Mesa’s overall API implementation. The installed Mesa version, the operating system’s graphics configuration, and whether software requests OpenGL ES or desktop OpenGL all matter. Mesa’s OpenGL ES documentation
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When checking an application or comparing two Pi 4 setups, establish these details rather than relying on a generic claim about the hardware:
- The Mesa version installed on each system.
- Whether the application requests OpenGL ES or desktop OpenGL.
- The API version actually exposed by the active driver.
- The operating system and graphics configuration in use.
Troubleshooting a geometry shader compile error
A Raspberry Pi forum user reported in May 2020 that a geometry shader compiled with a Mesa 20.1 development build, while also describing historical compiler and rendering-corruption issues. Another user’s reported error—“the number of vertices exceeds GL_MAX_VERTEX_OUTPUT”—was part of that older discussion. These are individual reports from a development build, not evidence that the same error is current or that all present Pi 4 configurations behave the same way. Raspberry Pi Forums discussion
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If a shader fails, first verify the API and driver your application actually receives, then check the shader’s declared output against the limit reported by that active context. A board’s theoretical capability or a historical Mesa development report does not establish the limits of a different installation.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What the milestones do—and do not—say about performance
Compute-shader availability means an application can use that graphics API feature when its driver exposes it; it does not show that moving work to a compute shader will make the application faster. The dated reports and driver documentation cited here establish API and development milestones, not measured performance results for particular workloads.
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