Update links

ray_tracing_indirect_scissor/README.md

@@ -1,14 +1,15 @@
-# NVIDIA Vulkan Ray Tracing Tutorial
+# NVIDIA Vulkan Trace Rays Indirect Tutorial
+This is an extension of the [Vulkan ray tracing tutorial](https://nvpro-samples.github.io/vk_raytracing_tutorial_KHR/).
 
-This example is the result of the ray tracing tutorial.
-The tutorial is adding ray tracing capability to an OBJ rasterizer in Vulkan
+We will discuss the `vkCmdTraceRaysIndirectKHR` command, which allows the
+`width`, `height`, and `depth` of a trace ray command to be specifed by a
+buffer on the device, rather than directly by the host. As a demonstration,
+this example will add colorful lanterns to the scene that add their own light
+and shadows, with a finite radius of effect. A compute shader will calculate
+scissor rectangles for each lantern, and an indirect trace rays command will
+dispatch rays for lanterns only within those scissor rectangles.
 
-If you haven't done it, [**Start Ray Tracing Tutorial**](https://nvpro-samples.github.io/vk_raytracing_tutorial_KHR/).
+[<h1>LINK TO FULL TUTORIAL</h1>](https://nvpro-samples.github.io/vk_raytracing_tutorial_KHR/vkrt_tuto_indirect_scissor.md.htm)
 
-![resultRaytraceShadowMedieval](../docs/Images/resultRaytraceShadowMedieval.png)
+![](../docs/Images/indirect_scissor/intro.png)
 
-## Going Further
-
-Once the tutorial completed and the basics of ray tracing are in place, other tuturials are going further from this code base.
-
-See all other [additional ray tracing tutorials](https://nvpro-samples.github.io/vk_raytracing_tutorial_KHR/vkrt_tuto_further.md.html)