[gimp-book-painting] Small revision on comparison figure Airbrush x Paintbrush and text of airbrush recomendation ...

[Americo Gobbo <amerigo src gnome org>]

commit cc2a389b123891237abcf3c6c14721c5c5ecf627
Author: Americo Gobbo <jag rabisco gmail com>
Date:   Sat Jul 7 13:15:32 2018 -0300

    Small revision on comparison figure Airbrush x Paintbrush and text of airbrush recomendation ...

 ...ric-brushes-dry-media-airbrush-x-paintbrush.png | Bin 169666 -> 162643 bytes
 parametric-brushes.md                              |   4 +---
 2 files changed, 1 insertion(+), 3 deletions(-)
---
diff --git a/parametric-brushes.assets/parametric-brushes-dry-media-airbrush-x-paintbrush.png 
b/parametric-brushes.assets/parametric-brushes-dry-media-airbrush-x-paintbrush.png
index 5a6dbb5..9be2fd2 100644
Binary files a/parametric-brushes.assets/parametric-brushes-dry-media-airbrush-x-paintbrush.png and 
b/parametric-brushes.assets/parametric-brushes-dry-media-airbrush-x-paintbrush.png differ
diff --git a/parametric-brushes.md b/parametric-brushes.md
index 6f512c3..0cadc1c 100644
--- a/parametric-brushes.md
+++ b/parametric-brushes.md
@@ -36,8 +36,6 @@ I have verified, also, that is possible to use different tools, pencil, paintbru
 
 <figure><img src="parametric-brushes.assets/parametric-brushes-dry-media-airbrush-x-paintbrush.png" width="" 
title="Parametric brush with Dry Media Paint Dynamics  - Paintbrush Tool versus Airbrush Tool" 
/><br><figcaption>Samples using round parametric brushes of the set with my paint dynamic Dry 
Media.</figcaption></figure>
 
-
-
 In general, all size brushes are working well, but mainly between 8 ~ 64 pixels is the better compromise. 
The large brushes are interesting to covering large areas and is not possible to have a good shape, they are 
appearing a bit soft.
 
 ## Parametric Basic Brush Set and Paint Dynamics | Download
@@ -46,7 +44,7 @@ The brush set contains the .vbr basic brushes, round and block (hard and soft ve
 Download [Brush Set + Paint 
Dynamics](parametric-brushes.assets/parametric-brushes-Brushset-and-paint-dynamics.zip "Parametric Brush Set 
+ Dry Media Paint Dynamics").
 
 ## Tool Options Settings
-To emulate better the dry media is necessary to use Airbrush Tool with this setting conditions on Tool 
Options:
+To emulate better the dry media I recommend to use Airbrush Tool with this setting conditions on Tool 
Options:
 * Opacity 75 ~ 100
 * Enable the Jitter and use values between 0.5 ~ 0.75 circa.
 * Force(¹) at 100% (normally is 50% by default).