AcademySoftwareFoundation

AcademySoftwareFoundation/OpenShadingLanguage

Advanced shading language for production GI renderers

Stars: 2.3k
Forks: 414
Open beginner issues: 0
Indexed issues: 64
Avg merge: 3d 1h
Merged PRs (30d): 10

Dominant language: C++
License: BSD-3-Clause
Last GitHub push: Sep 13, 2026
Latest indexed: Sep 14, 2026
Contributing guide: Contributing guide
Code of conduct: Code of conduct
Beginner labels: help wanted good first issue

Open All

64 open issues indexed

Untracked memory in OSL Open

AcademySoftwareFoundation/OpenShadingLanguage#658 · 3 comments · 0 reactions · 1 assignee · Indexed Sep 14, 2026
Initializing Shader Matrix Parameter Relative To World Writes Random Values to .oso Open

AcademySoftwareFoundation/OpenShadingLanguage#692 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
missed optimization Open

AcademySoftwareFoundation/OpenShadingLanguage#881 · 0 comments · 0 reactions · 1 assignee · Indexed Sep 14, 2026
can't set shader parameter with init code to zero Open

AcademySoftwareFoundation/OpenShadingLanguage#906 · 1 comment · 0 reactions · 1 assignee · Indexed Sep 14, 2026
Token-pasting operator (spec clarification) Open

docs

AcademySoftwareFoundation/OpenShadingLanguage#1008 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
OSL ShadingSystem::Execute() crashes when OptiX feature enabled Open

OptiX

AcademySoftwareFoundation/OpenShadingLanguage#1016 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
RendererServices::good() no longer used when generating textures Open

AcademySoftwareFoundation/OpenShadingLanguage#1122 · 5 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
missed optimization with return statement in function Open

AcademySoftwareFoundation/OpenShadingLanguage#1146 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
missed optimization with "complex" condition Open

AcademySoftwareFoundation/OpenShadingLanguage#1147 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
clang10 and pkgconfig issues with v1.11.4.1-dev Open

AcademySoftwareFoundation/OpenShadingLanguage#1155 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Optimize_group not thread safe when generating PTX for GPU runtime. Open

AcademySoftwareFoundation/OpenShadingLanguage#1181 · 19 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Transforms not working (everything is identity) in testshade --optix Open

AcademySoftwareFoundation/OpenShadingLanguage#1264 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
vector2 values are not passing through shader connections Open

AcademySoftwareFoundation/OpenShadingLanguage#1290 · 12 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
fmod producing the wrong results on the GPU Open

AcademySoftwareFoundation/OpenShadingLanguage#1384 · 8 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Crash creating and using OSLCompiler instances in mutliple threads Open

AcademySoftwareFoundation/OpenShadingLanguage#1427 · 6 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Mismatch between sizeof(Partio::ParticleIndex), sizeof(size_t), sizeof(int) Open

AcademySoftwareFoundation/OpenShadingLanguage#1482 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Bitcode serialization fails with unset Python_EXECUTABLE variable Open

AcademySoftwareFoundation/OpenShadingLanguage#1503 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
error: ‘const class llvm::Triple’ has no member named ‘isPS4CPU’; did you mean ‘isPS4’? Open

AcademySoftwareFoundation/OpenShadingLanguage#1525 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Read after free in TypeSpec::struct_list() Open

AcademySoftwareFoundation/OpenShadingLanguage#1573 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
asymmetry for userdata vs attributes with ShadingSystemImpl::getattribute Open

AcademySoftwareFoundation/OpenShadingLanguage#1622 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
testsuites that build subprojects ignore the options top level cmake was invoked with Open

AcademySoftwareFoundation/OpenShadingLanguage#1632 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Unresolved external symbols when building with batch mode on Windows Open

AcademySoftwareFoundation/OpenShadingLanguage#1645 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Intermittent crash in LLVM_Util::getPointerToFunction(llvm::Function* func) Open

AcademySoftwareFoundation/OpenShadingLanguage#1712 · 14 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Race condition when building testshade_llvm_compiled_rs Open

bug shading system

AcademySoftwareFoundation/OpenShadingLanguage#1762 · 0 comments · 1 reaction · 0 assignees · Indexed Sep 14, 2026
Bad file install locations Open

bug build / testing / port / CI

AcademySoftwareFoundation/OpenShadingLanguage#1771 · 3 comments · 1 reaction · 0 assignees · Indexed Sep 14, 2026
Grammar railroad diagram Open

AcademySoftwareFoundation/OpenShadingLanguage#1789 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
OSL fails assert when updating shader group after executing shader when using BatchedRendererServices Open

batch shading bug

AcademySoftwareFoundation/OpenShadingLanguage#1800 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Base closure pointer in layer is incorrect when using batched execute Open

batch shading bug shading system

AcademySoftwareFoundation/OpenShadingLanguage#1801 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Build fails with LTO Open

AcademySoftwareFoundation/OpenShadingLanguage#1810 · 4 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
build_osl.py utility is horribly out of date Open

build / testing / port / CI docs good first issue windows

AcademySoftwareFoundation/OpenShadingLanguage#1813 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Defining a canonical interface to random numbers Open

AcademySoftwareFoundation/OpenShadingLanguage#1830 · 13 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Consider running StepSecurity on your repo Open

AcademySoftwareFoundation/OpenShadingLanguage#1858 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Set up Windows build in our CI Open

build / testing / port / CI Dev Days good first issue help wanted windows

AcademySoftwareFoundation/OpenShadingLanguage#1860 · 11 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Meta-issue: osltoy features and fixes Open

Dev Days devdays24 enhancement feature request good first issue help wanted

AcademySoftwareFoundation/OpenShadingLanguage#1862 · 9 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Error: assigning to 'OpenImageIO_v2_6_5::TextureSystem *' from incompatible type 'std::shared_ptr<TextureSystem>' Open

AcademySoftwareFoundation/OpenShadingLanguage#1864 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Pre-generate Bison parser files in Repo Open

good first issue help wanted oslc

AcademySoftwareFoundation/OpenShadingLanguage#1878 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Matrix layout is only partially documented Open

AcademySoftwareFoundation/OpenShadingLanguage#1895 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
remap function included in the std library Open

AcademySoftwareFoundation/OpenShadingLanguage#1899 · 9 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Allow list initializer as function argument. Open

AcademySoftwareFoundation/OpenShadingLanguage#1906 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Array of struct not allowed as parameters Open

AcademySoftwareFoundation/OpenShadingLanguage#1910 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
iOS Builds Open

AcademySoftwareFoundation/OpenShadingLanguage#1912 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
texture function and unpremulted RGB output Open

AcademySoftwareFoundation/OpenShadingLanguage#1917 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
problem with integer geometry attributes and batched shader execution Open

batch shading

AcademySoftwareFoundation/OpenShadingLanguage#1929 · 6 comments · 0 reactions · 1 assignee · Indexed Sep 14, 2026
Null Pointer Exception possibly due to Invalid Cast from `llvm::Value*` to `llvm::Function*` Open

AcademySoftwareFoundation/OpenShadingLanguage#1957 · 3 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Unexpected behavior of unsized array defaults Open

AcademySoftwareFoundation/OpenShadingLanguage#1959 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
printf "%c" format specifier doesn't work in batch mode Open

batch shading bug

AcademySoftwareFoundation/OpenShadingLanguage#1965 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Beginner Repository Build Documentation Open

AcademySoftwareFoundation/OpenShadingLanguage#1974 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Example .osl Shaders Open

AcademySoftwareFoundation/OpenShadingLanguage#1975 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
Meta-issue: testrender wish list Open

AcademySoftwareFoundation/OpenShadingLanguage#1977 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026
testrender: Implement subsurface scattering Open

difficulty/medium help wanted testshade / testrender

AcademySoftwareFoundation/OpenShadingLanguage#1979 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 14, 2026

A short digest of beginner-friendly GitHub issues.