diff --git a/Color.h b/Color.h
index a8ec544..20a35e0 100644
--- a/Color.h
+++ b/Color.h
@@ -24,6 +24,7 @@ struct ColorEntry {
 	enum flags {
 		FlagNone	= 0x00,
 		FlagIgnore	= 0x01,
+		FlagAir		= 0x02,
 	};
 	ColorEntry(): r(0), g(0), b(0), a(0), t(0), f(0) {};
 	ColorEntry(uint8_t r, uint8_t g, uint8_t b, uint8_t a, uint8_t t, uint8_t f): r(r), g(g), b(b), a(a), t(t), f(f) {};
diff --git a/TileGenerator.cpp b/TileGenerator.cpp
index a875c80..212faef 100644
--- a/TileGenerator.cpp
+++ b/TileGenerator.cpp
@@ -648,6 +648,8 @@ void TileGenerator::parseNodeColorsLine(const std::string &line, std::string nam
 			while (!iflags.fail()) {
 				if (flag == "ignore")
 					f |= ColorEntry::FlagIgnore;
+				else if (flag == "air")
+					f |= ColorEntry::FlagAir;
 				iflags >> flag;
 			}
 		}
@@ -1667,9 +1669,18 @@ void TileGenerator::processMapBlock(const DB::Block &block)
 			}
 			else {
 				if (color != m_nodeColors.end()) {
+					// Colors marked 'ignore' take precedence over 'air'
 					if ((color->second.f & ColorEntry::FlagIgnore)) {
 						m_nodeIDColor[nodeId] = NodeColorNotDrawn;
 					}
+					// If the color is marked 'air', then treat it accordingly.
+					else if ((color->second.f & ColorEntry::FlagAir)) {
+						if (m_drawAir)
+							m_nodeIDColor[nodeId] = &color->second;
+						else
+							m_nodeIDColor[nodeId] = NodeColorNotDrawn;
+					}
+					// Regular node.
 					else {
 						m_nodeIDColor[nodeId] = &color->second;
 					}