Add more DR citations

Summary: Add more DR citations

Reviewed By: nikhilaravi

Differential Revision: D20330205

fbshipit-source-id: 4fb95d422371ae9ff5cdc2693736e36799201477

docs/notes/renderer.md

@@ -118,3 +118,15 @@ We redesigned the rendering pipeline from the ground up to be modular and extens
 <a id="1">[1]</a> Kato et al, 'Neural 3D Mesh Renderer', CVPR 2018
 
 <a id="2">[2]</a> Liu et al, 'Soft Rasterizer: A Differentiable Renderer for Image-based 3D Reasoning', ICCV 2019
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+<a id="3">[3]</a> Loper et al, 'OpenDR: An Approximate Differentiable Renderer', ECCV 2014
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+<a id="4">[4]</a> De La Gorce et al, 'Model-based 3D Hand Pose Estimation from Monocular Video', PAMI 2011
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+<a id="5">[5]</a> Li et al, 'Differentiable Monte Carlo Ray Tracing through Edge Sampling', SIGGRAPH Asia 2018
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+<a id="6">[6]</a> Yifan et al, 'Differentiable Surface Splatting for Point-based Geometry Processing', SIGGRAPH Asia 2019
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+<a id="7">[7]</a> Loubet et al, 'Reparameterizing Discontinuous Integrands for Differentiable Rendering', SIGGRAPH Asia 2019
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+<a id="8">[8]</a> Chen et al, 'Learning to Predict 3D Objects with an Interpolation-based Differentiable Renderer', NeurIPS 2019