Fixed some links in samples and Materials sections of docs

Author: Christopher Remde

docs/content/docs/tutorials/materials/index.md

@@ -69,7 +69,7 @@ The pointcloud material is emissive by default, to give a look similar to an unl
 
 ![Pointcloud shadergraph example](shadergraph-distortion.jpg)
 
-If you don't set a custom material, a default pointcloud material will be loaded that is appropriate for the chosen rendering path. You can create your own Pointcloud shaders to more finely tune the appearance of the points. You will need some experience with writing shaders for Unitys Shaderlab/GLSL and/or Shadergraph. We strongly recommend to take a look at the [Shadergraph Example](/Unity_Geometry_Sequence_Player/docs/tutorials/materials/samples/#sample-05-shadergraph) and clone one of the available pointcloud shaders found under:
+If you don't set a custom material, a default pointcloud material will be loaded that is appropriate for the chosen rendering path. You can create your own Pointcloud shaders to more finely tune the appearance of the points. You will need some experience with writing shaders for Unitys Shaderlab/GLSL and/or Shadergraph. We strongly recommend to take a look at the [Shadergraph Example](/Unity_Geometry_Sequence_Player/docs/tutorials/samples/#sample-05-shadergraph) and clone one of the available pointcloud shaders found under:
 
 `Packages > Geometry Sequence Player > Runtime > Shader > Resources`
 

docs/content/docs/tutorials/samples/index.md

@@ -104,6 +104,6 @@ To start, open up the Shadergraph at:
 
 `Assets\Samples\Geometry Sequence Player\1.2.0\Sequence Samples\ExampleData\ExtraAssets\Shaders\DistortionShader.shadergraph`
 
-and take a look at the comments there to get an understanding of what makes the shader work. It is strongly recommended to get a basic graps of shader and shadergraph concepts first!
+and take a look at the comments there to get an understanding of what makes the shader work. It is strongly recommended to get a basic grap of [shaders](https://thebookofshaders.com/) and [shadergraph concepts](https://docs.unity3d.com/6000.2/Documentation/Manual/shader-graph.html) before diving into this!
 
-[More info](/Unity_Geometry_Sequence_Player/docs/tutorials/materials/)
+[More info](/Unity_Geometry_Sequence_Player/docs/tutorials/materials-and-shaders/)