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What in the Graphics is Volumetric Rendering?!

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Varun Gajre

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Description

What in the Graphics is Volumetric Rendering?! is Varun Gajre's introductory blog post on the 3D Engineer blog, part of the What The Graphics series aimed at demystifying 3D topics for newcomers. The article contrasts voxels with screen pixels and explains density grids as the core data structure behind volume rendering.

Gajre connects volumetric techniques to medical imaging, industrial CT scans, and game VFX such as smoke and fire, emphasizing that many effects are ray integration through scalar fields rather than surface meshes alone. Interactive sections demonstrate 3D texture slicing and colormap classification on scanned volume data so readers can see transfer functions change appearance without a full engine.

Beginners with basic linear algebra and curiosity about scientific visualization are the intended audience. The post does not assume prior shader writing, though it points toward how GPUs sample 3D textures in real time.

Gajre's What The Graphics posts are shared in beginner-friendly graphics communities as accessible explainers alongside university visualization notes.