diff --git a/materials.dtd b/materials.dtd
index 8611ed328..52edc6b3d 100644
--- a/materials.dtd
+++ b/materials.dtd
@@ -10,7 +10,8 @@ properties in materials.xml.
 <!ENTITY % colours "r?, g?, b?, a?">
 
 <!ELEMENT PropertyList (material+)>
-<!ELEMENT material (name+, texture, wrapu?, wrapv?, mipmap?, xsize?, ysize?,
+<!ELEMENT material (name+, texture, wrapu?, wrapv?, mipmap?, filtering?, 
+                    xsize?, ysize?,
 		    light-coverage?, ambient?, diffuse?, specular?, emissive?)>
 <!ELEMENT name (#PCDATA)>
 <!ELEMENT texture (#PCDATA)>
diff --git a/materials.xml b/materials.xml
index b867862a4..0285ded44 100644
--- a/materials.xml
+++ b/materials.xml
@@ -126,29 +126,34 @@ Shared parameters for various materials.
 <material>
  <name>pa_taxiway</name>
  <texture>Runway/pa_taxiway.rgb</texture>
+ <filtering>8.</filtering>
 </material>
 
 <material>
  <name>pa_tiedown</name>
  <texture>Runway/pa_tiedown.rgb</texture>
+ <filtering>8.</filtering>
 </material>
 
 <material>
  <name>pa_dspl_thresh</name>
  <texture>Runway/pa_dspl_thresh.rgb</texture>
  <wrapu>false</wrapu>
+ <filtering>8.</filtering>
 </material>
 
 <material>
  <name>pa_dspl_arrows</name>
  <texture>Runway/pa_dspl_arrows.rgb</texture>
  <wrapu>false</wrapu>
+ <filtering>8.</filtering>
 </material>
 
 <material>
  <name>pa_threshold</name>
  <texture>Runway/pa_threshold.rgb</texture>
  <wrapu>false</wrapu>
+ <filtering>8.</filtering>
  <wrapv>false</wrapv>
 </material>
 
@@ -156,234 +161,273 @@ Shared parameters for various materials.
  <name>pa_L</name>
  <texture>Runway/pa_L.rgb</texture>
  <wrapu>false</wrapu>
+ <filtering>8.</filtering>
 </material>
 
 <material>
  <name>pa_R</name>
  <texture>Runway/pa_R.rgb</texture>
  <wrapu>false</wrapu>
+ <filtering>8.</filtering>
 </material>
 
 <material>
  <name>pa_C</name>
  <texture>Runway/pa_C.rgb</texture>
  <wrapu>false</wrapu>
+ <filtering>8.</filtering>
 </material>
 
 <material>
  <name>pa_0l</name>
  <texture>Runway/pa_0l.rgb</texture>
  <wrapu>false</wrapu>
+ <filtering>8.</filtering>
 </material>
 
 <material>
  <name>pa_0r</name>
  <texture>Runway/pa_0r.rgb</texture>
  <wrapu>false</wrapu>
+ <filtering>8.</filtering>
 </material>
 
 <material>
  <name>pa_1c</name>
  <texture>Runway/pa_1c.rgb</texture>
  <wrapu>false</wrapu>
+ <filtering>8.</filtering>
 </material>
 
 <material>
  <name>pa_1l</name>
  <texture>Runway/pa_1l.rgb</texture>
  <wrapu>false</wrapu>
+ <filtering>8.</filtering>
 </material>
 
 <material>
  <name>pa_1r</name>
  <texture>Runway/pa_1r.rgb</texture>
  <wrapu>false</wrapu>
+ <filtering>8.</filtering>
 </material>
 
 <material>
  <name>pa_11</name>
  <texture>Runway/pa_11.rgb</texture>
  <wrapu>false</wrapu>
+ <filtering>8.</filtering>
 </material>
 
 <material>
  <name>pa_2c</name>
  <texture>Runway/pa_2c.rgb</texture>
  <wrapu>false</wrapu>
+ <filtering>8.</filtering>
 </material>
 
 <material>
  <name>pa_2l</name>
  <texture>Runway/pa_2l.rgb</texture>
  <wrapu>false</wrapu>
+ <filtering>8.</filtering>
 </material>
 
 <material>
  <name>pa_2r</name>
  <texture>Runway/pa_2r.rgb</texture>
  <wrapu>false</wrapu>
+ <filtering>8.</filtering>
 </material>
 
 <material>
  <name>pa_3c</name>
  <texture>Runway/pa_3c.rgb</texture>
  <wrapu>false</wrapu>
+ <filtering>8.</filtering>
 </material>
 
 <material>
  <name>pa_3l</name>
  <texture>Runway/pa_3l.rgb</texture>
  <wrapu>false</wrapu>
+ <filtering>8.</filtering>
 </material>
 
 <material>
  <name>pa_3r</name>
  <texture>Runway/pa_3r.rgb</texture>
  <wrapu>false</wrapu>
+ <filtering>8.</filtering>
 </material>
 
 <material>
  <name>pa_4c</name>
  <texture>Runway/pa_4c.rgb</texture>
  <wrapu>false</wrapu>
+ <filtering>8.</filtering>
 </material>
 
 <material>
  <name>pa_4r</name>
  <texture>Runway/pa_4r.rgb</texture>
  <wrapu>false</wrapu>
+ <filtering>8.</filtering>
 </material>
 
 <material>
  <name>pa_5c</name>
  <texture>Runway/pa_5c.rgb</texture>
  <wrapu>false</wrapu>
+ <filtering>8.</filtering>
 </material>
 
 <material>
  <name>pa_5r</name>
  <texture>Runway/pa_5r.rgb</texture>
  <wrapu>false</wrapu>
+ <filtering>8.</filtering>
 </material>
 
 <material>
  <name>pa_6c</name>
  <texture>Runway/pa_6c.rgb</texture>
  <wrapu>false</wrapu>
+ <filtering>8.</filtering>
 </material>
 
 <material>
  <name>pa_6r</name>
  <texture>Runway/pa_6r.rgb</texture>
  <wrapu>false</wrapu>
+ <filtering>8.</filtering>
 </material>
 
 <material>
  <name>pa_7c</name>
  <texture>Runway/pa_7c.rgb</texture>
  <wrapu>false</wrapu>
+ <filtering>8.</filtering>
 </material>
 
 <material>
  <name>pa_7r</name>
  <texture>Runway/pa_7r.rgb</texture>
  <wrapu>false</wrapu>
+ <filtering>8.</filtering>
 </material>
 
 <material>
  <name>pa_8c</name>
  <texture>Runway/pa_8c.rgb</texture>
  <wrapu>false</wrapu>
+ <filtering>8.</filtering>
 </material>
 
 <material>
  <name>pa_8r</name>
  <texture>Runway/pa_8r.rgb</texture>
  <wrapu>false</wrapu>
+ <filtering>8.</filtering>
 </material>
 
 <material>
  <name>pa_9c</name>
  <texture>Runway/pa_9c.rgb</texture>
  <wrapu>false</wrapu>
+ <filtering>8.</filtering>
 </material>
 
 <material>
  <name>pa_9r</name>
  <texture>Runway/pa_9r.rgb</texture>
  <wrapu>false</wrapu>
+ <filtering>8.</filtering>
 </material>
 
 <material>
  <name>pa_tz_three</name>
  <texture>Runway/pa_tz_three.rgb</texture>
  <wrapu>false</wrapu>
+ <filtering>8.</filtering>
 </material>
 
 <material>
  <name>pa_aim</name>
  <texture>Runway/pa_aim.rgb</texture>
  <wrapu>false</wrapu>
+ <filtering>8.</filtering>
 </material>
 
 <material>
  <name>pa_tz_two_a</name>
  <texture>Runway/pa_tz_two_a.rgb</texture>
  <wrapu>false</wrapu>
+ <filtering>8.</filtering>
 </material>
 
 <material>
  <name>pa_tz_two_b</name>
  <texture>Runway/pa_tz_two_b.rgb</texture>
  <wrapu>false</wrapu>
+ <filtering>8.</filtering>
 </material>
 
 <material>
  <name>pa_tz_one_a</name>
  <texture>Runway/pa_tz_one_a.rgb</texture>
  <wrapu>false</wrapu>
+ <filtering>8.</filtering>
 </material>
 
 <material>
  <name>pa_tz_one_b</name>
  <texture>Runway/pa_tz_one_b.rgb</texture>
  <wrapu>false</wrapu>
+ <filtering>8.</filtering>
 </material>
 
 <material>
  <name>pa_centerline</name>
  <texture>Runway/pa_centerline.rgb</texture>
  <wrapu>false</wrapu>
+ <filtering>8.</filtering>
 </material>
 
 <material>
  <name>pa_rest</name>
  <texture>Runway/pa_rest.rgb</texture>
  <wrapu>false</wrapu>
+ <filtering>8.</filtering>
 </material>
 
 <material>
  <name>pc_taxiway</name>
  <name>dirt_rwytaxiway</name>
  <texture>Runway/pc_taxiway.rgb</texture>
+ <filtering>8.</filtering>
 </material>
 
 <material>
  <name>pc_tiedown</name>
  <name>dirt_rwytiedown</name>
  <texture>Runway/pc_tiedown.rgb</texture>
+ <filtering>8.</filtering>
 </material>
 
 <material>
  <name>pc_dspl_thresh</name>
  <texture>Runway/pc_dspl_thresh.rgb</texture>
  <wrapu>false</wrapu>
+ <filtering>8.</filtering>
 </material>
 
 <material>
  <name>pc_dspl_arrows</name>
  <texture>Runway/pc_dspl_arrows.rgb</texture>
  <wrapu>false</wrapu>
+ <filtering>8.</filtering>
 </material>
 
 <material>
@@ -392,6 +436,7 @@ Shared parameters for various materials.
  <texture>Runway/pc_threshold.rgb</texture>
  <wrapu>false</wrapu>
  <wrapv>false</wrapv>
+ <filtering>8.</filtering>
 </material>
 
 <material>
@@ -399,6 +444,7 @@ Shared parameters for various materials.
  <name>dirt_rwyL</name>
  <texture>Runway/pc_L.rgb</texture>
  <wrapu>false</wrapu>
+ <filtering>8.</filtering>
 </material>
 
 <material>
@@ -406,6 +452,7 @@ Shared parameters for various materials.
  <name>dirt_rwyR</name>
  <texture>Runway/pc_R.rgb</texture>
  <wrapu>false</wrapu>
+ <filtering>8.</filtering>
 </material>
 
 <material>
@@ -413,6 +460,7 @@ Shared parameters for various materials.
  <name>dirt_rwyC</name>
  <texture>Runway/pc_C.rgb</texture>
  <wrapu>false</wrapu>
+ <filtering>8.</filtering>
 </material>
 
 <material>
@@ -420,6 +468,7 @@ Shared parameters for various materials.
  <name>dirt_rwy0l</name>
  <texture>Runway/pc_0l.rgb</texture>
  <wrapu>false</wrapu>
+ <filtering>8.</filtering>
 </material>
 
 <material>
@@ -427,6 +476,7 @@ Shared parameters for various materials.
  <name>dirt_rwy0r</name>
  <texture>Runway/pc_0r.rgb</texture>
  <wrapu>false</wrapu>
+ <filtering>8.</filtering>
 </material>
 
 <material>
@@ -434,6 +484,7 @@ Shared parameters for various materials.
  <name>dirt_rwy1c</name>
  <texture>Runway/pc_1c.rgb</texture>
  <wrapu>false</wrapu>
+ <filtering>8.</filtering>
 </material>
 
 <material>
@@ -441,6 +492,7 @@ Shared parameters for various materials.
  <name>dirt_rwy1l</name>
  <texture>Runway/pc_1l.rgb</texture>
  <wrapu>false</wrapu>
+ <filtering>8.</filtering>
 </material>
 
 <material>
@@ -448,6 +500,7 @@ Shared parameters for various materials.
  <name>dirt_rwy1r</name>
  <texture>Runway/pc_1r.rgb</texture>
  <wrapu>false</wrapu>
+ <filtering>8.</filtering>
 </material>
 
 <material>
@@ -455,6 +508,7 @@ Shared parameters for various materials.
  <name>dirt_rwy11</name>
  <texture>Runway/pc_11.rgb</texture>
  <wrapu>false</wrapu>
+ <filtering>8.</filtering>
 </material>
 
 <material>
@@ -462,6 +516,7 @@ Shared parameters for various materials.
  <name>dirt_rwy2c</name>
  <texture>Runway/pc_2c.rgb</texture>
  <wrapu>false</wrapu>
+ <filtering>8.</filtering>
 </material>
 
 <material>
@@ -469,6 +524,7 @@ Shared parameters for various materials.
  <name>dirt_rwy2l</name>
  <texture>Runway/pc_2l.rgb</texture>
  <wrapu>false</wrapu>
+ <filtering>8.</filtering>
 </material>
 
 <material>
@@ -476,6 +532,7 @@ Shared parameters for various materials.
  <name>dirt_rwy2r</name>
  <texture>Runway/pc_2r.rgb</texture>
  <wrapu>false</wrapu>
+ <filtering>8.</filtering>
 </material>
 
 <material>
@@ -483,6 +540,7 @@ Shared parameters for various materials.
  <name>dirt_rwy3c</name>
  <texture>Runway/pc_3c.rgb</texture>
  <wrapu>false</wrapu>
+ <filtering>8.</filtering>
 </material>
 
 <material>
@@ -490,6 +548,7 @@ Shared parameters for various materials.
  <name>dirt_rwy3l</name>
  <texture>Runway/pc_3l.rgb</texture>
  <wrapu>false</wrapu>
+ <filtering>8.</filtering>
 </material>
 
 <material>
@@ -504,6 +563,7 @@ Shared parameters for various materials.
  <name>dirt_rwy4c</name>
  <texture>Runway/pc_4c.rgb</texture>
  <wrapu>false</wrapu>
+ <filtering>8.</filtering>
 </material>
 
 <material>
@@ -511,6 +571,7 @@ Shared parameters for various materials.
  <name>dirt_rwy4r</name>
  <texture>Runway/pc_4r.rgb</texture>
  <wrapu>false</wrapu>
+ <filtering>8.</filtering>
 </material>
 
 <material>
@@ -518,6 +579,7 @@ Shared parameters for various materials.
  <name>dirt_rwy5c</name>
  <texture>Runway/pc_5c.rgb</texture>
  <wrapu>false</wrapu>
+ <filtering>8.</filtering>
 </material>
 
 <material>
@@ -525,6 +587,7 @@ Shared parameters for various materials.
  <name>dirt_rwy5r</name>
  <texture>Runway/pc_5r.rgb</texture>
  <wrapu>false</wrapu>
+ <filtering>8.</filtering>
 </material>
 
 <material>
@@ -532,6 +595,7 @@ Shared parameters for various materials.
  <name>dirt_rwy6c</name>
  <texture>Runway/pc_6c.rgb</texture>
  <wrapu>false</wrapu>
+ <filtering>8.</filtering>
 </material>
 
 <material>
@@ -539,6 +603,7 @@ Shared parameters for various materials.
  <name>dirt_rwy6r</name>
  <texture>Runway/pc_6r.rgb</texture>
  <wrapu>false</wrapu>
+ <filtering>8.</filtering>
 </material>
 
 <material>
@@ -546,6 +611,7 @@ Shared parameters for various materials.
  <name>dirt_rwy7c</name>
  <texture>Runway/pc_7c.rgb</texture>
  <wrapu>false</wrapu>
+ <filtering>8.</filtering>
 </material>
 
 <material>
@@ -553,6 +619,7 @@ Shared parameters for various materials.
  <name>dirt_rwy7r</name>
  <texture>Runway/pc_7r.rgb</texture>
  <wrapu>false</wrapu>
+ <filtering>8.</filtering>
 </material>
 
 <material>
@@ -560,6 +627,7 @@ Shared parameters for various materials.
  <name>dirt_rwy8c</name>
  <texture>Runway/pc_8c.rgb</texture>
  <wrapu>false</wrapu>
+ <filtering>8.</filtering>
 </material>
 
 <material>
@@ -567,6 +635,7 @@ Shared parameters for various materials.
  <name>dirt_rwy8r</name>
  <texture>Runway/pc_8r.rgb</texture>
  <wrapu>false</wrapu>
+ <filtering>8.</filtering>
 </material>
 
 <material>
@@ -574,6 +643,7 @@ Shared parameters for various materials.
  <name>dirt_rwy9c</name>
  <texture>Runway/pc_9c.rgb</texture>
  <wrapu>false</wrapu>
+ <filtering>8.</filtering>
 </material>
 
 <material>
@@ -581,6 +651,7 @@ Shared parameters for various materials.
  <name>dirt_rwy9r</name>
  <texture>Runway/pc_9r.rgb</texture>
  <wrapu>false</wrapu>
+ <filtering>8.</filtering>
 </material>
 
 <material>
@@ -588,6 +659,7 @@ Shared parameters for various materials.
  <name>dirt_rwytz_three</name>
  <texture>Runway/pc_tz_three.rgb</texture>
  <wrapu>false</wrapu>
+ <filtering>8.</filtering>
 </material>
 
 <material>
@@ -595,6 +667,7 @@ Shared parameters for various materials.
  <name>dirt_rwyaim</name>
  <texture>Runway/pc_aim.rgb</texture>
  <wrapu>false</wrapu>
+ <filtering>8.</filtering>
 </material>
 
 <material>
@@ -602,6 +675,7 @@ Shared parameters for various materials.
  <name>dirt_rwytz_two_a</name>
  <texture>Runway/pc_tz_two_a.rgb</texture>
  <wrapu>false</wrapu>
+ <filtering>8.</filtering>
 </material>
 
 <material>
@@ -609,6 +683,7 @@ Shared parameters for various materials.
  <name>dirt_rwytz_two_b</name>
  <texture>Runway/pc_tz_two_b.rgb</texture>
  <wrapu>false</wrapu>
+ <filtering>8.</filtering>
 </material>
 
 <material>
@@ -616,6 +691,7 @@ Shared parameters for various materials.
  <name>dirt_rwytz_one_a</name>
  <texture>Runway/pc_tz_one_a.rgb</texture>
  <wrapu>false</wrapu>
+ <filtering>8.</filtering>
 </material>
 
 <material>
@@ -623,6 +699,7 @@ Shared parameters for various materials.
  <name>dirt_rwytz_one_b</name>
  <texture>Runway/pc_tz_one_b.rgb</texture>
  <wrapu>false</wrapu>
+ <filtering>8.</filtering>
 </material>
 
 <material>
@@ -630,6 +707,7 @@ Shared parameters for various materials.
  <name>dirt_rwycenterline</name>
  <texture>Runway/pc_centerline.rgb</texture>
  <wrapu>false</wrapu>
+ <filtering>8.</filtering>
 </material>
 
 <material>
@@ -637,6 +715,7 @@ Shared parameters for various materials.
  <name>dirt_rwyrest</name>
  <texture>Runway/pc_rest.rgb</texture>
  <wrapu>false</wrapu>
+ <filtering>8.</filtering>
 </material>
 
 <!-- Default -->