small website updates

Summary: Small fixes to website rendering

Reviewed By: jcjohnson

Differential Revision: D23281746

fbshipit-source-id: c9dc8edd5e52f39d4e0e19f10ecc7e035b39feda

docs/notes/cameras.md

+---
+hide_title: true
+sidebar_label: Cameras
+---
+
 # Cameras
 
 ## Camera Coordinate Systems

docs/notes/cubify.md

+---
+hide_title: true
+sidebar_label: Cubify
+---
+
 # Cubify
 
 The [cubify operator](https://github.com/facebookresearch/pytorch3d/blob/master/pytorch3d/ops/cubify.py) converts an 3D occupancy grid of shape `BxDxHxW`, where `B` is the batch size, into a mesh instantiated as a [Meshes](https://github.com/facebookresearch/pytorch3d/blob/master/pytorch3d/structures/meshes.py) data structure of `B` elements. The operator replaces every occupied voxel (if its occupancy probability is greater than a user defined threshold) with a cuboid of 12 faces and 8 vertices. Shared vertices are merged, and internal faces are removed resulting in a **watertight** mesh.

docs/notes/datasets.md

+---
+hide_title: true
+sidebar_label: Data loaders
+---
+
 # Data loaders for common 3D Datasets
 
 ### ShapetNetCore

docs/notes/renderer_getting_started.md

@@ -41,7 +41,7 @@ Rendering requires transformations between several different coordinate frames:
 
 For example, given a teapot mesh, the world coordinate frame, camera coordiante frame and image are show in the figure below. Note that the world and camera coordinate frames have the +z direction pointing in to the page.
 
-<img src="assets/world_camera_image.png" width="1000">
+<img src="assets/world_camera_image.jpg" width="1000">
 
 ---
 

website/pages/en/index.js

@@ -131,10 +131,7 @@ loss_chamfer, _ = chamfer_distance(sample_sphere, sample_test)
         <Container>
           <ol>
             <li>
-              <strong>Install PyTorch3D:</strong>
-              <p>See the instructions
-              <a href="https://github.com/facebookresearch/pytorch3d/blob/master/INSTALL.md">here</a>.
-              </p>
+              <strong>Install PyTorch3D  </strong> (following the instructions <a href="https://github.com/facebookresearch/pytorch3d/blob/master/INSTALL.md">here</a>)
             </li>
             <li>
               <strong>Try a few 3D operators  </strong>