Consolidate LLR into a single file.

1 files changed, 12 insertions, 2 deletions

diff --git a/README.md b/README.md
index 491761d..3a30ee4 100644
--- a/README.md
+++ b/README.md
@@ -23,7 +23,7 @@ The `Gfx` object represents the graphics subsystem and is at the center of the
 library's high-level API. The `Gfx` object exposes a render backend (`GfxCore`)
 and a `Renderer`, and allows the caller to create `Scene`s.
 
-### Render Backend
+### Render Backend ("Core")
 
 The render backend (`GfxCore`) is a thin abstraction layer over low-level
 graphics APIs like OpenGL or Vulkan. It holds GPU resources such as geometry,
@@ -43,7 +43,17 @@ manage resource lifetime.
 
 ### Low-level Renderer
 
-`ImmRenderer` is a low-level, immediate mode renderer.
+The low-level renderer (`LLR`) provides a low-level, immediate-mode interface
+on top of the render backend. It understands higher-level concepts to make
+rendering more convenient (object, mesh, material, light, camera, etc), but is
+still relatively low-level and does not understand any particular scene data
+structure.
+
+### Immediate-mode Renderer
+
+The immediate-mode renderer (`Imm`) provides an API to define and render
+geometry procedurally and on the spot. It should be reserved for debug or
+not-performance-intensive rendering.
 
 ### Scene