light-cone-shell-queries

KO | EN

gitlite — search

#java #deep-learning #large-language-models #electron #tailwindcss #ai #list #react-native #open-source #gemini

light-cone-shell-queries

(★ 9)

Source code (C++) for the EGSR 2026 paper "Light-Cone Shell Queries for Scalable Time-Gated Rendering."

File Explorer

ZIP Download

- config-linux-gcc-debug.py
- config-linux-gcc.py
- config-linux-icl.py
- config-macos10.6-gcc-universal.py
- config-macos10.6-gcc-x86.py
- config-macos10.6-gcc-x86_64.py
- config-macos10.6-icl-x86.py
- config-macos10.6-icl-x86_64.py
- config-macos10.7-gcc-universal.py
- config-macos10.7-gcc-x86.py
- config-macos10.7-gcc-x86_64.py
- config-macos10.7-icl-x86.py
- config-macos10.7-icl-x86_64.py
- config-macos10.8-gcc-x86_64.py
- config-macos10.9-gcc-x86_64.py
- config-win32-icl.py
- config-win32-msvc2010-debug.py
- config-win32-msvc2010.py
- config-win64-icl.py
- config-win64-msvc2010-debug.py
- config-win64-msvc2010.py
- config-win64-msvc2013-debug.py
- config-win64-msvc2013.py
- mitsuba-msvc2010.sln
- mitsuba-msvc2010.vcxproj
- mitsuba-msvc2010.vcxproj.filters
- SConscript.configure
- SConscript.install
- - FindCOLLADA.cmake
  - FindEigen.cmake
  - FindFFTW3.cmake
  - FindGLEW.cmake
  - FindIlmBase.cmake
  - FindOpenEXR.cmake
  - FindReleaseAndDebug.cmake
  - FindX11.cmake
  - FindXerces.cmake
  - MitsubaBuildOptions.cmake
  - MitsubaExternal.cmake
  - MitsubaUtil.cmake
  - MtsBundleUtilities.cmake
  - MtsGetVersionInfo.cmake
  - PCHTargets.cmake
- - add-icl-libraries.sh
  - build-dmg.sh
  - crash_report.sh
  - extract-symbols.sh
  - Info.plist
  - Info.plist.in
  - lipo.sh
  - PkgInfo
  - PreviewSettings.nib
  - PreviewSettings.xib
  - qmake_fake.c
  - qt.conf
  - strip-symbols.sh
- - cluster.py
  - readme.txt
- - a-C.eta.spd
  - a-C.k.spd
  - Ag.eta.spd
  - Ag.k.spd
  - Al.eta.spd
  - Al.k.spd
  - AlAs.eta.spd
  - AlAs.k.spd
  - AlAs_palik.eta.spd
  - AlAs_palik.k.spd
  - AlSb.eta.spd
  - AlSb.k.spd
  - AlSb_palik.eta.spd
  - AlSb_palik.k.spd
  - Au.eta.spd
  - Au.k.spd
  - Be.eta.spd
  - Be.k.spd
  - Be_palik.eta.spd
  - Be_palik.k.spd
  - CMakeLists.txt
  - Cr.eta.spd
  - Cr.k.spd
  - CsI.eta.spd
  - CsI.k.spd
  - CsI_palik.eta.spd
  - CsI_palik.k.spd
  - Cu.eta.spd
  - Cu.k.spd
  - Cu2O.eta.spd
  - Cu2O.k.spd
  - Cu2O_palik.eta.spd
  - Cu2O_palik.k.spd
  - Cu_palik.eta.spd
  - Cu_palik.k.spd
  - CuO.eta.spd
  - CuO.k.spd
  - CuO_palik.eta.spd
  - CuO_palik.k.spd
  - d-C.eta.spd
  - d-C.k.spd
  - d-C_palik.eta.spd
  - d-C_palik.k.spd
  - Hg.eta.spd
  - Hg.k.spd
  - Hg_palik.eta.spd
  - Hg_palik.k.spd
  - HgTe.eta.spd
  - HgTe.k.spd
  - HgTe_palik.eta.spd
  - HgTe_palik.k.spd
  - Ir.eta.spd
  - Ir.k.spd
  - Ir_palik.eta.spd
  - Ir_palik.k.spd
  - K.eta.spd
  - K.k.spd
  - K_palik.eta.spd
  - K_palik.k.spd
  - Li.eta.spd
  - Li.k.spd
  - Li_palik.eta.spd
  - Li_palik.k.spd
  - MgO.eta.spd
  - MgO.k.spd
  - MgO_palik.eta.spd
  - MgO_palik.k.spd
  - Mo.eta.spd
  - Mo.k.spd
  - Mo_palik.eta.spd
  - Mo_palik.k.spd
  - Na_palik.eta.spd
  - Na_palik.k.spd
  - Nb.eta.spd
  - Nb.k.spd
  - Nb_palik.eta.spd
  - Nb_palik.k.spd
  - Ni_palik.eta.spd
  - Ni_palik.k.spd
  - Rh.eta.spd
  - Rh.k.spd
  - Rh_palik.eta.spd
  - Rh_palik.k.spd
  - Se-e.eta.spd
  - Se-e.k.spd
  - Se-e_palik.eta.spd
  - Se-e_palik.k.spd
  - Se.eta.spd
  - Se.k.spd
  - Se_palik.eta.spd
  - Se_palik.k.spd
  - SiC.eta.spd
  - SiC.k.spd
  - SiC_palik.eta.spd
  - SiC_palik.k.spd
  - SnTe.eta.spd
  - SnTe.k.spd
  - SnTe_palik.eta.spd
  - SnTe_palik.k.spd
  - Ta.eta.spd
  - Ta.k.spd
  - Ta_palik.eta.spd
  - Ta_palik.k.spd
  - Te-e.eta.spd
  - Te-e.k.spd
  - Te-e_palik.eta.spd
  - Te-e_palik.k.spd
  - Te.eta.spd
  - Te.k.spd
  - Te_palik.eta.spd
  - Te_palik.k.spd
  - ThF4.eta.spd
  - ThF4.k.spd
  - ThF4_palik.eta.spd
  - ThF4_palik.k.spd
  - TiC.eta.spd
  - TiC.k.spd
  - TiC_palik.eta.spd
  - TiC_palik.k.spd
  - TiN.eta.spd
  - TiN.k.spd
  - TiN_palik.eta.spd
  - TiN_palik.k.spd
  - TiO2-e.eta.spd
  - TiO2-e.k.spd
  - TiO2-e_palik.eta.spd
  - TiO2-e_palik.k.spd
  - TiO2.eta.spd
  - TiO2.k.spd
  - TiO2_palik.eta.spd
  - TiO2_palik.k.spd
  - V_palik.eta.spd
  - V_palik.k.spd
  - VC.eta.spd
  - VC.k.spd
  - VC_palik.eta.spd
  - VC_palik.k.spd
  - VN.eta.spd
  - VN.k.spd
  - VN_palik.eta.spd
  - VN_palik.k.spd
  - W.eta.spd
  - W.k.spd
- - mitsuba.desktop
- - beckmann.dat
  - CMakeLists.txt
  - ggx.dat
  - phong.dat
- - mitsuba_precompiled.hpp
- - myutil.cpp
  - README
  - SConstruct
- - CMakeLists.txt
  - scene.xsd
  - upgrade_0.3.0.xsl
  - upgrade_0.4.0.xsl
  - upgrade_0.5.0.xsl
- - detect_python.py
  - icl12.py
  - qt4.py
- - rendertime.py
- - test_bidir_0.xml
  - test_bidir_1.xml
  - test_bidir_2.xml
  - test_bsdf.xml
  - test_emitter.xml
  - test_phase.xml
- - build-dist.bat
  - extract-symbols.ps1
  - genproj.py
  - getdate.c
  - getdate.exe
  - mitsuba-msvc2010.sln.template
  - mitsuba-msvc2010.vcxproj.filters.template
  - mitsuba-msvc2010.vcxproj.template
  - mitsuba.ico
  - mitsuba_res.rc
  - mitsuba_res.rc.in
  - qmake_fake.c
  - README.txt
  - wmain_stub.cpp
- - mainpage.dox
- - bidir-figures.ai
  - bsdf_bumpmap.pdf
  - bsdf_coating.pdf
  - bsdf_conductor.pdf
  - bsdf_dielectric.pdf
  - bsdf_dielectric_figure.pdf
  - bsdf_difftrans.pdf
  - bsdf_diffuse.pdf
  - bsdf_hk.pdf
  - bsdf_overview.ai
  - bsdf_overview.pdf
  - bsdf_plastic.pdf
  - bsdf_plastic_intscat_1.pdf
  - bsdf_plastic_intscat_2.pdf
  - bsdf_plastic_intscat_3.pdf
  - bsdf_roughcoating.pdf
  - bsdf_roughconductor.pdf
  - bsdf_roughdielectric.pdf
  - bsdf_roughdiffuse.pdf
  - bsdf_roughplastic.pdf
  - bsdf_thindielectric_figure.pdf
  - bsdf_thindielectric_intscat.ai
  - emitter_area.pdf
  - emitter_collimated.pdf
  - emitter_constant.pdf
  - emitter_directional.pdf
  - emitter_envmap.pdf
  - emitter_envmap_axes.ai
  - emitter_envmap_axes.pdf
  - emitter_overview.ai
  - emitter_overview.pdf
  - emitter_point.pdf
  - emitter_sky.pdf
  - emitter_spot.pdf
  - emitter_sun.pdf
  - emitter_sunsky.pdf
  - glass_explanation.ai
  - glass_explanation.pdf
  - integrator_bdpt_sketch.pdf
  - integrator_bdpt_unweighted.pdf
  - integrator_bdpt_weighted.pdf
  - integrator_mlt_sketch.pdf
  - integrator_path_figure.ai
  - integrator_path_figure.pdf
  - integrator_pssmlt_sketch.pdf
  - logo_plain.pdf
  - path_explanation.ai
  - path_explanation.pdf
  - plastic_intscat.ai
  - sampler_halton_nonscrambled_0.pdf
  - sampler_halton_nonscrambled_32.pdf
  - sampler_halton_rscrambled_0.pdf
  - sampler_halton_rscrambled_32.pdf
  - sampler_halton_scrambled_0.pdf
  - sampler_halton_scrambled_32.pdf
  - sampler_hammersley_0.pdf
  - sampler_hammersley_32.pdf
  - sampler_independent.pdf
  - sampler_ldsampler_0.pdf
  - sampler_ldsampler_32.pdf
  - sampler_sobol_0.pdf
  - sampler_sobol_nonscrambled_0.pdf
  - sampler_sobol_nonscrambled_32.pdf
  - sampler_stratified.pdf
  - sampler_stratified_strata.pdf
- acknowledgements.tex
- basics.tex
- blender.tex
- compiling.tex
- development.tex
- Doxyfile
- format.tex
- gendoc.py
- gpl-v3.tex
- integrator.tex
- introduction.tex
- license.txt
- macros.sty
- main.bib
- main.tex
- Makefile
- misc.tex
- parallelization.tex
- plugins.tex
- python.tex
- section_bsdf.tex
- section_emitters.tex
- section_films.tex
- section_integrators.tex
- section_media.tex
- section_phase.tex
- section_rfilters.tex
- section_samplers.tex
- section_sensors.tex
- section_shapes.tex
- section_subsurface.tex
- section_textures.tex
- section_volumes.tex
- - cbox_coded_ortho_cam.xml
  - cbox_coded_persp_cam.xml
  - cbox_orthographic_proj.xml
  - cbox_perspective_proj.xml
- - compile.sh
  - createMeanAndSDImages.cc
  - README
  - tinyexr_adi.h
- - mitsuba.h
- - checkgrad.m
  - checkgrad2.m
- - barycentricTest.m
  - circleLineIntersection.m
  - circleLineIntersection2.m
  - circleLineIntersection_old.m
  - circlePolygonIntersectionAngles.m
  - circlePolygonIntersectionAngles_old.m
  - circlePolygonTest.m
  - EllipsoidPlaneIntersection.m
  - EllipsoidTriangleIntersectionSampling.m
  - ellipticSample.m
  - insideTriangleCheck.m
  - numberOfCircleLineIntersections.m
  - SpecialcircleLineIntersection.m
  - testEllipticSample.m
  - Vectors2RotationMatrix.m
  - WeightedIP.m
  - weightIP.m
- - displayAndSaveVideo.m
  - exr.cpp
  - exr.h
  - exr2avi.m
  - exr2mat.py
  - exrget.cpp
  - exrread.cpp
  - exrwrite.cpp
  - isexr.cpp
  - Makefile
  - openexr.mk
  - test_exr.cpp
- - file.h
  - mex_utils.h
- - CompareEllipticRenderers.m
  - EllipsoidTriangleIntersectionSamplingFunction.m
  - EllipticRenderer_timeRandomized.m
  - PhotonEllipticRenderer.m
  - SurfaceEllipticRenderer.m
- - CircleRenderer.m
  - CircleRenderer_radiusRandomized.m
  - CircleRenderer_timeRandomized.m
  - CompareRenderers.m
  - PhotonRenderer.m
  - SurfaceRenderer.m
- gcc.mk
- matlab.mk
- mex_utils.mk
- - cbox_bunny.xml
- - blendbsdf.cpp
  - bumpmap.cpp
  - CMakeLists.txt
  - coating.cpp
  - conductor.cpp
  - dielectric.cpp
  - difftrans.cpp
  - diffuse.cpp
  - hk.cpp
  - ior.h
  - irawan.cpp
  - irawan.h
  - mask.cpp
  - microfacet.h
  - mixturebsdf.cpp
  - normalmap.cpp
  - null.cpp
  - phong.cpp
  - plastic.cpp
  - roughcoating.cpp
  - roughconductor.cpp
  - roughdielectric.cpp
  - roughdiffuse.cpp
  - roughplastic.cpp
  - rtrans.h
  - SConscript
  - thindielectric.cpp
  - twosided.cpp
  - ward.cpp
- - CMakeLists.txt
  - collada.cpp
  - converter.cpp
  - converter.h
  - mtsimport.cpp
  - obj.cpp
  - SConscript
- - area.cpp
  - CMakeLists.txt
  - collimated.cpp
  - constant.cpp
  - directional.cpp
  - envmap.cpp
  - orthographicEmitterImpl.cpp
  - perspectiveEmitterImpl.cpp
  - point.cpp
  - SConscript
  - sky.cpp
  - spot.cpp
  - sun.cpp
  - sunsky.cpp
- - annotations.h
  - banner.h
  - CMakeLists.txt
  - cnpy.cpp
  - cnpy.h
  - hdrfilm.cpp
  - ldrfilm.cpp
  - mfilm.cpp
  - SConscript
  - tiledhdrfilm.cpp
- - CMakeLists.txt
  - SConscript
- - CMakeLists.txt
  - common.cpp
  - edge.cpp
  - manifold.cpp
  - mut_bidir.cpp
  - mut_caustic.cpp
  - mut_lens.cpp
  - mut_manifold.cpp
  - mut_mchain.cpp
  - path.cpp
  - pathsampler.cpp
  - rsampler.cpp
  - SConscript
  - util.cpp
  - verification.cpp
  - vertex.cpp
- - aabb.cpp
  - appender.cpp
  - bitmap.cpp
  - brent.cpp
  - chisquare.cpp
  - class.cpp
  - CMakeLists.txt
  - cstream.cpp
  - fmtconv.cpp
  - formatter.cpp
  - fresolver.cpp
  - fstream.cpp
  - getopt.c
  - half.cpp
  - lock.cpp
  - logger.cpp
  - math.cpp
  - mmap.cpp
  - mstream.cpp
  - object.cpp
  - platform_darwin.mm
  - plugin.cpp
  - properties.cpp
  - qmc.cpp
  - quad.cpp
  - random.cpp
  - rfilter.cpp
  - sched.cpp
  - sched_remote.cpp
  - SConscript
  - serialization.cpp
  - shvector.cpp
  - spectrum.cpp
  - spline.cpp
  - ssemath.cpp
  - sshstream.cpp
  - sstream.cpp
  - statistics.cpp
  - stream.cpp
  - thread.cpp
  - timer.cpp
  - tls.cpp
  - track.cpp
  - transform.cpp
  - triangle.cpp
  - util.cpp
  - vmf.cpp
  - warp.cpp
  - zstream.cpp
- - basicshader.cpp
  - CMakeLists.txt
  - device.cpp
  - font.cpp
  - glgeometry.cpp
  - glprogram.cpp
  - glrenderer.cpp
  - glsync.cpp
  - gltexture.cpp
  - glxdevice.cpp
  - glxrenderer.cpp
  - gpugeometry.cpp
  - gpuprogram.cpp
  - gpusync.cpp
  - gputexture.cpp
  - nsgldevice.mm
  - nsglrenderer.mm
  - nsglsession.mm
  - renderer.cpp
  - SConscript
  - session.cpp
  - shadow.cpp
  - viewer.cpp
  - vpl.cpp
  - wgldevice.cpp
  - wglrenderer.cpp
  - wglsession.cpp
  - x11device.cpp
  - x11session.cpp
- - base.h
  - CMakeLists.txt
  - core.cpp
  - render.cpp
  - SConscript
- - bsdf.cpp
  - CMakeLists.txt
  - common.cpp
  - ellipsoid.cpp
  - emitter.cpp
  - film.cpp
  - gatherproc.cpp
  - imageblock.cpp
  - imageproc.cpp
  - integrator.cpp
  - intersection.cpp
  - irrcache.cpp
  - medium.cpp
  - noise.cpp
  - particleproc.cpp
  - pathlengthsampler.cpp
  - phase.cpp
  - photon.cpp
  - photonmap.cpp
  - rectwu.cpp
  - renderjob.cpp
  - renderproc.cpp
  - renderqueue.cpp
  - sampler.cpp
  - scene.cpp
  - scenehandler.cpp
  - SConscript
  - sensor.cpp
  - shader.cpp
  - shape.cpp
  - skdtree.cpp
  - subsurface.cpp
  - testcase.cpp
  - texture.cpp
  - trimesh.cpp
  - util.cpp
  - volume.cpp
  - vpl.cpp
- - CMakeLists.txt
  - heterogeneous.cpp
  - homogeneous.cpp
  - materials.h
  - maxexp.h
  - SConscript
- - CMakeLists.txt
  - darwin_stub.mm
  - mitsuba.cpp
  - mtssrv.cpp
  - mtsutil.cpp
  - SConscript
- - aboutdlg.cpp
  - aboutdlg.h
  - aboutdlg.ui
  - acknowledgmentdlg.cpp
  - acknowledgmentdlg.h
  - acknowledgmentdlg.ui
  - addserverdlg.cpp
  - addserverdlg.h
  - addserverdlg.ui
  - breakpad.mm
  - CMakeLists.txt
  - common.h
  - glwidget.cpp
  - glwidget.h
  - importdlg.cpp
  - importdlg.h
  - importdlg.ui
  - loaddlg.cpp
  - loaddlg.h
  - loaddlg.ui
  - locateresourcedlg.cpp
  - locateresourcedlg.h
  - locateresourcedlg.ui
  - logwidget.cpp
  - logwidget.h
  - main.cpp
  - mainwindow.cpp
  - mainwindow.h
  - mainwindow.ui
  - preview.cpp
  - preview.h
  - previewsettingsdlg.cpp
  - previewsettingsdlg.h
  - previewsettingsdlg.ui
  - previewsettingsdlg_cocoa.cpp
  - previewsettingsdlg_cocoa.h
  - previewsettingsdlg_cocoa_impl.mm
  - programsettingsdlg.cpp
  - programsettingsdlg.h
  - programsettingsdlg.ui
  - qtmain_win.cpp
  - rendersettingsdlg.cpp
  - rendersettingsdlg.h
  - rendersettingsdlg.ui
  - resources.qrc
  - save.cpp
  - save.h
  - sceneimporter.cpp
  - sceneimporter.h
  - sceneinfodlg.cpp
  - sceneinfodlg.h
  - sceneinfodlg.ui
  - sceneloader.cpp
  - sceneloader.h
  - SConscript
  - server.cpp
  - server.h
  - simdtonemap.cpp
  - simdtonemap.h
  - symlinks_auth.cpp
  - symlinks_install.c
  - tabbar.cpp
  - tabbar.h
  - test_simdtonemap.cpp
  - updatedlg.cpp
  - updatedlg.h
  - updatedlg.ui
  - upgrade.cpp
  - upgrade.h
  - xmltreemodel.cpp
  - xmltreemodel.h
- - CMakeLists.txt
  - hg.cpp
  - isotropic.cpp
  - kkay.cpp
  - microflake.cpp
  - microflake_fiber.h
  - mixturephase.cpp
  - rayleigh.cpp
  - SConscript
- - box.cpp
  - catmullrom.cpp
  - CMakeLists.txt
  - gaussian.cpp
  - lanczos.cpp
  - mitchell.cpp
  - SConscript
  - tent.cpp
- - CMakeLists.txt
  - faure.cpp
  - faure.h
  - halton.cpp
  - hammersley.cpp
  - independent.cpp
  - ldsampler.cpp
  - SConscript
  - sobol.cpp
  - sobolseq.cpp
  - sobolseq.h
  - stratified.cpp
- - CMakeLists.txt
  - codedOrthographic.cpp
  - codedPerspective.cpp
  - fluencemeter.cpp
  - irradiancemeter.cpp
  - orthographic.cpp
  - perspective.cpp
  - perspective_rdist.cpp
  - radiancemeter.cpp
  - SConscript
  - spherical.cpp
  - telecentric.cpp
  - thinlens.cpp
- - CMakeLists.txt
  - cube.cpp
  - cylinder.cpp
  - deformable.cpp
  - disk.cpp
  - hair.cpp
  - hair.h
  - heightfield.cpp
  - instance.cpp
  - instance.h
  - obj.cpp
  - ply.cpp
  - rectangle.cpp
  - SConscript
  - serialized.cpp
  - shapegroup.cpp
  - shapegroup.h
  - sphere.cpp
- - bluenoise.cpp
  - bluenoise.h
  - CMakeLists.txt
  - dipole.cpp
  - irrproc.cpp
  - irrproc.h
  - irrtree.cpp
  - irrtree.h
  - SConscript
  - singlescatter.cpp
- - CMakeLists.txt
  - SConscript
  - test_chisquare.cpp
  - test_dgeom.cpp
  - test_kd.cpp
  - test_la.cpp
  - test_microfacet.cpp
  - test_quad.cpp
  - test_random.cpp
  - test_rtrans.cpp
  - test_samplers.cpp
  - test_sh.cpp
  - test_spectrum.cpp
- - bitmap.cpp
  - checkerboard.cpp
  - CMakeLists.txt
  - curvature.cpp
  - gridtexture.cpp
  - scale.cpp
  - SConscript
  - vertexcolors.cpp
  - wireframe.cpp
- - addimages.cpp
  - CMakeLists.txt
  - cylclip.cpp
  - joinrgb.cpp
  - kdbench.cpp
  - rdielprec.cpp
  - SConscript
  - tonemap.cpp
- - CMakeLists.txt
  - constvolume.cpp
  - gridvolume.cpp
  - hgridvolume.cpp
  - SConscript
  - volcache.cpp
.agignore
.gitignore
CMakeLists.txt
INSTALL.txt
INSTALL_20.04.txt
INSTALLEXR2avi.txt
LICENSE
README.md
SConstruct
setpath.csh
setpath.sh
teaser.png
USAGE.txt

# Use via CDN

jsDelivr

jsDelivr serves any public GitHub repository as a CDN with zero setup. Pick a version and a file to get a ready-to-paste link and snippet.

Version

File

Link

Example

// repository documentation

Was this content helpful?

★ 0 (0 ratings)

Reference implementation of:

> **Light-Cone Shell Queries for Scalable Time-Gated Rendering**
> Jack Cui, Juhyeon Kim, Adithya Pediredla, Wojciech Jarosz
> *Computer Graphics Forum (Proceedings of EGSR), 45(4), 2026.*
>
> [Paper (PDF)](TODO: add paper URL) · [Project page](TODO: add project-page URL)

![Light-Cone Shell Queries teaser](https://raw.githubusercontent.com/dartmouth-vcl/light-cone-shell-queries/main/teaser.png)

Monte&nbsp;Carlo time-gated rendering requires sampling light paths whose total
travel time falls within a narrow interval — a constraint that is difficult to
importance sample. The vertices that yield a time-valid connection to a given
query point form a *light-cone shell* (LCS) in the joint space of position and
accumulated travel time. We store the vertices of traced light subpaths in a 4D
spatiotemporal hierarchy and recast the time-gated connection as a range query
over this shell, using pruning and importance sampling to select time-valid
vertices **without intersecting scene geometry**. This decouples the cost of time
gating from scene complexity. The method is implemented inside a bidirectional
path tracer as the `bdpt_lcs` integrator plugin, and significantly reduces
variance over prior work (BDPT, ellipsoidal path connections) on scenes with up
to 2.4M triangles.

This renderer extends [Mitsuba 0.6](https://www.mitsuba-renderer.org/) with
time-of-flight (ToF) / transient rendering; see *Lineage & credits* below.

---

## The `bdpt_lcs` integrator

`bdpt_lcs` builds a fixed pool of emitter subpaths once, organizes their vertices
into a stochastic-lightcuts-style spatiotemporal tree, and then renders in
repeated passes, querying the light-cone shell at each shade point. The time gate
is taken from the film's transient decomposition (`minBound`/`maxBound`).

Key parameters (Mitsuba `<integer>`/`<float>`/`<boolean>` properties):

| Parameter | Default | Meaning |
|---|---|---|
| `numVPLs` | 1000 | Target size of the (fixed) light-vertex pool. |
| `maxRenderTime` | 0 | Wall-clock budget in seconds. `0` ⇒ run `sampleCount` passes instead. |
| `samplesPerPass` | 1 | Samples-per-pixel rendered per pass. |
| `numLCSamples` | 1 | Stochastic lightcuts selections per pixel sample. |
| `lcClamping` | 0 | Distance clamping for lightcuts bounds. |
| `lcGeometryAlpha` | 1.0 | Threshold for the consistent-geometry term. |
| `maxDiffuseVertices` | -1 | Max diffuse sensor-subpath vertices to evaluate (`-1` = all). |
| `powerBuckets` | 8 | Temporal power buckets in the tree. |
| `prioritySplitLevels` | 3 | Top tree levels forced to split on path length. |
| `timeStretchFactor` | 1.0 | Multiplier on the path-length axis when choosing the split axis. |
| `timeSplitPeriod` | 0 | Force a path-length split every N levels (`0` = disabled). |
| `splitTree` | false | Split vertices into direct (s=1) and indirect (s≥2) trees. |
| `cosineBounds` | false | Enable cosine bounds in the tree walk. |
| `extractCollimated` | true | Connect collimated-beam vertices deterministically. |
| `bucketSpatialBounds` | false | Give each temporal power bucket its own spatial AABB. |
| `rrDepthEmitter` / `rrDepthSensor` | 5 / 5 | Russian-roulette start depth for each subpath. |
| `maxDepth` | -1 | Maximum path depth (`-1` = unbounded). |

---

## Building (native, Ubuntu)

This is a SCons-based build (there is no working CMake path). See
[`INSTALL_20.04.txt`](INSTALL_20.04.txt) for the full, copy-pasteable Ubuntu
20.04 instructions; the short version:

```bash
# Dependencies (Ubuntu 20.04)
sudo apt-get update
sudo apt-get install git g++ build-essential scons \
  libeigen3-dev libxerces-c-dev libjpeg-dev libpng-dev \
  libilmbase-dev libopenexr-dev openexr \
  libxxf86vm-dev libbz2-dev libfftw3-dev libboost-all-dev \
  libglewmx-dev libglu1-mesa-dev

# Configure: copy a build config template to config.py (config.py is gitignored)
git clone https://github.com/<your-org>/MitsubaToFRenderer.git
cd MitsubaToFRenderer
cp build/config-linux-gcc.py config.py     # edit if your paths differ

# Build (the command-line `mitsuba` binary plus all plugins)
scons

# Put the binaries / plugins on your path
source setpath.sh
```

> **Known issues on newer Ubuntu (22.04+):** the legacy GUI (`mtsgui`) depends on
> Qt4 and GLEW-MX (`libglewmx`), which are no longer packaged on recent releases.
> The command-line renderer does not need the GUI. If the GUI fails to build,
> build only what you need or disable `mtsgui` in `SConstruct`. Eigen is now
> installed via `libeigen3-dev` (the old pinned Bitbucket tarball URL is dead).

For Ubuntu 16.04, see [`INSTALL.txt`](INSTALL.txt).

---

## Running

The renderer outputs OpenEXR. For a time-gated (transient-slice) render, set the
gate on the film via the `transient` decomposition (`minBound`/`maxBound` in
path-length units; with `c = 1`, path length and travel time are interchangeable)
and use the `bdpt_lcs` integrator:

```bash
# Render the included self-contained Cornell-box-with-bunny scene
mitsuba scenes/cbox_bunny/cbox_bunny.xml
```

See [`USAGE.txt`](USAGE.txt) for the ToF/CW-ToF camera modes and the various
`-D` scene parameters, and [`INSTALLEXR2avi.txt`](INSTALLEXR2avi.txt) for viewing
or converting the `.exr` output (image / video / MATLAB).

---

## Scenes & assets

Most paper scenes rely on large meshes that are **not** included in this
repository. As a self-contained example that exercises the full pipeline, the
repository ships [`scenes/cbox_bunny/`](scenes/cbox_bunny) — a Cornell box with a
Stanford bunny — including its own `meshes/` folder. To keep the repo small it
uses the **lowest-resolution bunny** (`bun_zipper_res7`, the coarsest variant from
the triangle-count ablation). Other meshes/textures are gitignored (`*.obj`,
`*.ply`, `/meshes`, …), so the bundled scene's meshes are force-added.

---

## Lineage & credits

This project is built on **MitsubaToFRenderer**, which adds time-of-flight /
transient rendering and *ellipsoidal path connections* (Pediredla et al. 2019) on
top of [Mitsuba 0.6](https://www.mitsuba-renderer.org/) by Wenzel Jakob, and the
coded-projector/coded-camera extensions from
[mitsuba_clt](https://github.com/cmu-ci-lab/mitsuba_clt). Scene-file syntax
follows the [Mitsuba documentation](https://www.mitsuba-renderer.org/releases/current/documentation.pdf).

---

## Citation

If you use this renderer, please cite the LCS paper:

```bibtex
@article{cui2026lightcone,
  title   = {Light-Cone Shell Queries for Scalable Time-Gated Rendering},
  author  = {Cui, Jack and Kim, Juhyeon and Pediredla, Adithya and Jarosz, Wojciech},
  journal = {Computer Graphics Forum (Proceedings of EGSR)},
  volume  = {45},
  number  = {4},
  year    = {2026}
}
```

The time-gated rendering framework this builds on:

```bibtex
@article{pediredla2019ellipsoidal,
  title     = {Ellipsoidal path connections for time-gated rendering},
  author    = {Pediredla, Adithya and Veeraraghavan, Ashok and Gkioulekas, Ioannis},
  journal   = {ACM Transactions on Graphics (TOG)},
  volume    = {38},
  number    = {4},
  pages     = {1--12},
  year      = {2019},
  publisher = {ACM New York, NY, USA}
}
```

---

## License

Derived from Mitsuba, this project is free software released under the
**GNU General Public License, Version 3**
(<https://www.gnu.org/licenses/gpl-3.0.html>). Being a "viral" license, the GPL
applies to all derivative work.

light-cone-shell-queries

Owner Repos

File Explorer

# Use via CDN

Was this content helpful?

Recent Feedback

light-cone-shell-queries

Owner Repos

File Explorer

# Use via CDN

Was this content helpful?

Recent Feedback

Download README