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(Blender) Cosmology with Geometry Nodes

7 hours ago
  • #cosmology
  • #blender
  • #visualization
  • The author uses Blender's Geometry Nodes in cosmology for computation, visualization, and debugging, notably with Cosmic Microwave Background (CMB) radiation data.
  • Geometry Nodes enable SIMD (Single Instruction Multiple Data) computations on mesh elements, useful for small-scale projects and real-time results in cosmology.
  • Key applications include visualizing CMB sky maps, pixel-preserving rotations, simulating Doppler boost and aberration effects, generating square images for machine learning, simulating gravitational lensing, and creating Mollweide projections in real-time.
  • HEALPix (Hierarchical Equal Area isoLatitude Pixelation) is used for efficient spherical data storage and computation, integrated with Geometry Nodes for map analysis.
  • Float64 precision is emulated using two float32 numbers to handle high-resolution cosmological data accurately within Geometry Nodes.
  • The techniques are inspired by general physics applications and could extend to areas like crystal simulations, astrophysics, and general relativity.