Master

Python 3.9 support. Tensorflow bump 2.4.1 -> 2.5.0. PyTorch bump 1.7.1 -> 1.8.1 (LTS)
Fix undefined names: docstr and VisibleDeprecationWarning (PR #3844)
Corrected documentation for Tensor based PointClound, LineSet, TriangleMesh (PR #4685)
Corrected documentation for KDTree (typo in Notebook) (PR #4744)
Remove setuptools and wheel from requirements for end users (PR #5020)
Fix various typos (PR #5070)
Exposed more functionality in SLAM pipeline
Fix for depth estimation for VoxelBlockGrid
Reserve fragment buffer for VoxelBlockGrid operations
Fix raycasting scene: Allow setting of number of threads that are used for building a raycasting scene
Fix Python bindings for CUDA device synchronization, voxel grid saving (PR #5425)

0.13

CUDA support 10.1 -> 11.0. Tensorflow 2.3.1 -> 2.4.1. PyTorch 1.6.0 -> 1.7.1 (PR #3049). This requires a custom PyTorch wheel from https://github.com/isl-org/open3d_downloads/releases/tag/torch1.7.1 due to PyTorch issue #52663

RealSense SDK v2 integrated for reading RS bag files (PR #2646)
Tensor based RGBDImage class, Python bindings for Image and RGBDImage
RealSense sensor configuration, live capture and recording (with example and tutorial) (PR #2748)
Add mouselook for the legacy visualizer (PR #2551)
Add function to randomly downsample pointcloud (PR #3050)
Allow TriangleMesh with textures to be added (PR #3170)
Python property of open3d.visualization.rendering.Open3DScene get_view has been renamed to view.
Added LineSet::CreateCameraVisualization() for creating a simple camera visualization from intrinsic and extrinsic matrices (PR #3255)

Fixes bug for preloading libc++ and libc++abi in Python
Added GUI widgets and model-viewing app
Fixes travis for race-condition on macOS
Fixes appveyor configuration and to build all branches
Updated travis.yml to support Ubuntu 18.04, gcc-7, and clang-7.0
Contributors guidelines updated
Avoid cstdlib random generators in ransac registration, use C++11 random instead.
Fixed a bug in open3d::geometry::TriangleMesh::ClusterConnectedTriangles.
Added option BUILD_BENCHMARKS for building microbenchmarks
Extend Python API of UniformTSDFVolume to allow setting the origin
Corrected documentation of PointCloud.h
Added ISS Keypoint Detector
Added an RPC interface for external visualizers running in a separate process
Added maximum_error and boundary_weight parameter to simplify_quadric_decimation
Remove support for Python 3.5
Development wheels are available for user testing. See Getting Started page for installation.
PointCloud File IO support for new tensor data types.
New PointCloud format support: XYZI (ASCII).
Fast compression mode for PNG writing. (Issue #846)
Ubuntu 20.04 (Focal) support.
Added Line3D/Ray3D/Segment3D classes with plane, point, closest-distance, and AABB tests
Updated Open3D.h.in to add certain missing header files
Add Open3D-ML to Open3D wheel
Fix a bug in PointCloud file format, use float instead of float_t
Add per-point covariance member for geometry::PointCloud class.
Add Generalized ICP implementation.