Questions tagged [spherical-harmonics]

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Spherical Harmonics for view-dependent effects in research of learned radiance fields (NeRF, 3D Gaussian Splatting)

In research on making the rendering of learned radiance fields (e.g., neural radiance fields) faster, many approaches use Spherical Harmonics (SH) to approximate view-dependent color (e.g. baking SH ...
wawaderwaran's user avatar
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Questions about caculate the highlight direction from spherical harmonics functions

Recently I‘m working on a Precomputed GI Project I'm trying to use a technique called AHD, Amibent Highlight Direction, rendering my project; I use Unity and my target platform is Android. First: ...
Jiang Yon's user avatar
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alternative to spherical harmonics to model radiance aproximation, optimized for real-time evaluation

I'm looking for a compact representation of radiance over the hemisphere that is also performant to evaluate in realtime (in a pixel shader). The purpose of it is to compress surface lightfields so ...
matthias_buehlmann's user avatar
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Lighting ramps compressed to zonal harmonics

Let's say I have a lighting lobe represented as a ndotl ramp texture, how do I compress it into a zonal harmonic?
user29244's user avatar
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Different basis from spherical harmonics to represent light?

There's a lot of research being done in 3D shape analysis when it comes to PDE methods. Recently I've been reading quite a bit of literature on this subject and recent trends in this subject propose ...
user8469759's user avatar
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Baked anisotropic filtering using spherical harmonics

I want to learn is it good or bad idea. Let's assume video RAM is not a problem. For source texture create a texture of texels: spherical functions. Spherical functions defined by small arrays of ...
Tomilov Anatoliy's user avatar