Rendering to Texture Test

A Render-to-Texture Test is a GPU benchmark that evaluates hardware graphics efficiency when rendering multi-pass scenes and post-processing convolutions into off-screen WebGL2 Framebuffer Objects (FBOs).

Yes. WebGL2 allocates genuine GPU VRAM texture attachments and binds hardware framebuffers. All render passes, ping-pong texture swaps, and fragment shaders execute directly on your physical graphics hardware.

A framebuffer is a collection of GPU memory buffers (color, depth, stencil) that serves as the canvas target for rendering commands. An FBO allows rendering into textures rather than directly onto the visible screen.

Moving from 512×512 to 2048×2048 or 4096×4096 multiplies the number of texels processed per pass by up to 64 times. Shading and writing 16.7 million texels per pass demands immense GPU memory bandwidth and fillrate.

A render pass is a discrete stage in a rendering pipeline where geometry or a fullscreen quad is drawn into a specific framebuffer. Multi-pass rendering uses the output texture of one pass as the input texture for the next.

Off-screen rendering generates graphics into private GPU memory buffers rather than immediately presenting them to the user's display. This enables complex composition, shadow generation, and image post-processing.

RGBA16F is a half-precision 16-bit floating-point texture format that supports High Dynamic Range (HDR) values beyond the standard 0.0–1.0 color spectrum, essential for realistic bloom and optical effects.

Certain floating-point formats like RGBA16F require hardware extension support (such as EXT_color_buffer_float). If your GPU driver or browser does not expose the capability, our test safely disables the option with clear guidance.

Browsers implement WebGL on top of different underlying graphics APIs (such as DirectX ANGLE on Windows vs Metal on macOS). Driver overhead and framebuffer management efficiency vary across browser rendering engines.

Yes. For integrated graphics (like Intel Iris, AMD Radeon 780M, or mobile SoCs), start with 1024×1024 or 512×512 render targets and 2 to 4 passes for optimal stability and smooth benchmarking.

No. Standard browser security sandboxes prevent web applications from querying hardware motherboard sensors or thermal diodes. We never fabricate fake temperature, fan speed, or power numbers.

Every pass adds an entire fullscreen rasterization cycle, texture read/write memory transactions, and framebuffer binding overhead. An 8-pass pipeline performs 8 times as many off-screen rendering operations as a single pass.

Post-processing applies image filtering and visual effects (such as Gaussian blur, bloom glow, and chromatic aberration) onto a 2D render-target texture after the base 3D scene has already been rendered.

Yes. Because our benchmark uses deterministic procedural algorithms and pre-allocated GPU resources, running identical presets (e.g. 2048×2048, 4 passes, RGBA8, 30s) produces a reliable, repeatable benchmark for hardware comparison.