v3.1.0

New features

• Enable ray tracing against two different scenes in a single kernel df79cb
• Make ShapeGroup traversable and updatable e0871a
• Enable differentiation of to_world in instance 54d2d3
• Enable differentiation of to_world in sphere, rectangle, disk and cylinder f5dbed .. b5d8c
• Enable differentiation of to_world in perspective and thinlens ef9f55 .. ea513f
• Add BSDF::eval_diffuse_reflectance() to most BSDF plugins 59af88
• Add mi.OptixDenoiser class for simple denoising in Python 13234 .. 55293
• envmap plugin can be constructed from mi.Bitmap object 9389c8

Other improvements

• Major performance improvements in cuda_* variants with new version of Dr.Jit
• Deprecated samples_per_pass parameter 8ba85
• Fix rendering progress bar on Windows d8db80
• obj file parsing performance improvements on Windows 28660f
• Fix mi.luminance() for monochromatic modes 61b95
• Add bindings for PluginManager.create_object() 4ebf70
• Fix SceneParameters.update() unnecessary hash computation f57e74
• Fix numerical instabilities with box filter splatting 2d8976
• Improve math::bisect algorithm 7ca09a
• Fix syntax highlighting in documentation and tutorials 5aa271
• Fix Optimizer.set_learning_rate for int values 53143d
• Various minor improvements to the Python typing stub generation b7ef349 .. ad72a53
• Minor improvements to the documentation
• Various other minor fixes