Minor wording improvements in the introduction section. (#91)

index.html

@@ -37,12 +37,12 @@
 
 In outline the structure consists of:
    - A [base substrate](index.html#model/basesubstrate) made of a mixture of [metal](index.html#model/metallicbase) or [dielectric](index.html#model/dielectricbase). The interface (dielectric or metal) of this base layer produces the primary specular reflection lobe. The dielectric-base represents either of three components, that can be statistically mixed:
-        1. [Glossy-diffuse](index.html#model/dielectricbase/glossy-diffuse): dielectric with opaque "diffuse" internal media, for e.g. mud, wood, dense rock, and concrete.
-        2. [Subsurface](index.html#model/dielectricbase/subsurface): dielectric with dense highly scattering internal media, for e.g. marble, plastic, skin, and vegetation.
-        3. [Translucent-base](index.html#model/dielectricbase/translucentbase) dielectric with translucent internal media, for e.g. glass, crystals, and liquids.
+        1. [Glossy-diffuse](index.html#model/dielectricbase/glossy-diffuse): dielectric with opaque "diffuse" internal media, for example mud, wood, dense rock, and concrete.
+        2. [Subsurface](index.html#model/dielectricbase/subsurface): dielectric with dense highly scattering internal media, for example marble, plastic, skin, and vegetation.
+        3. [Translucent-base](index.html#model/dielectricbase/translucentbase) dielectric with translucent internal media, for example glass, crystals, and liquids.
    - [Coat](index.html#model/coat): An optional layer of dielectric, which may have an absorbing medium, acting as a coating on top of the base substrate.
      The dielectric interface of this coat layer provides a secondary specular lobe.
-   - [Fuzz](index.html#model/fuzz): An optional layer representing the reflection from micro-fibers (e.g. fine hair, peach fuzz, textile strands, dust, etc.) on top of everything else.
+   - [Fuzz](index.html#model/fuzz): An optional layer representing the reflection from micro-fibers (such as fine hair, peach fuzz, textile strands, and dust grains) on top of everything else.
 
    ![Figure [diagram_model]: Schematic illustration of the idealized material model that our shader emulates. Horizontal stacking of components represents statistical mixture and vertical stacking represents layering.](images/model_schematic.svg width="100%")