diff --git a/main.cc b/main.cc
index 4fcd696..2f7788e 100644
--- a/main.cc
+++ b/main.cc
@@ -60,6 +60,9 @@ void T_Main::mainLoop( )
 			initDemo( );
 		}
 
+		Globals::Watcher( ).check( );
+		Globals::Shaders( ).update( );
+
 		glFinish( );
 		p.startFrame( );
 		p.start( "Full frame" );
@@ -70,7 +73,6 @@ void T_Main::mainLoop( )
 			render( );
 			p.end( "Full frame" );
 			Globals::Window( ).swap( );
-			Globals::Watcher( ).check( );
 			p.endFrame( );
 		}
 	}
diff --git a/raymarcher.cc b/raymarcher.cc
index ef86630..7740e4a 100644
--- a/raymarcher.cc
+++ b/raymarcher.cc
@@ -1,6 +1,7 @@
 #include "externals.hh"
 #include "raymarcher.hh"
 #include "profiling.hh"
+#include "globals.hh"
 
 
 namespace {
@@ -14,7 +15,7 @@ namespace {
 T_Raymarcher::T_Raymarcher(
 		__rd__ const uint32_t width ,
 		__rd__ const uint32_t height )
-	: camera_( ) , program_( GL_FRAGMENT_SHADER ) ,
+	: camera_( ) ,
 		txOutput_( width , height , E_TexType::RGB16F ) ,
 		txDepth_( width , height , E_TexType::R16F ) ,
 		rtOutput_( T_RendertargetSetup( )
@@ -22,39 +23,22 @@ T_Raymarcher::T_Raymarcher(
 				.add( txDepth_ )
 				.create( ) )
 {
-#if 0
-	glGenProgramPipelines( 1 , &pipeline_ );
-#endif
-
-	program_.addFile( "raymarch-header.glsl" );
-	program_.addFile( "pbr.glsl" );
-	program_.addFile( "blinn-phong.glsl" );
-	program_.addFile( "map.glsl" );
-	program_.addFile( "raymarcher.glsl" );
-	program_.load( );
-
-#if 0
-	auto& fsq( T_ShaderProgram::FullscreenQuad( watcher ) );
-	glUseProgramStages( pipeline_ , GL_VERTEX_SHADER_BIT , fsq.id( ) );
-	glUseProgramStages( pipeline_ , GL_FRAGMENT_SHADER_BIT , program_.id( ) );
-	assert( glGetError( ) == GL_NO_ERROR );
-#endif
+	program_ = Globals::Shaders( ).pipeline({
+			"fullscreen.v.glsl" , "scene.f.glsl" });
 }
 
 
 void T_Raymarcher::render( )
 {
 	PSTART( );
-	if ( ! rtOutput_.activate( ) ) {
+	if ( !rtOutput_.activate( ) || !program_.valid( ) ) {
+		glClearColor( 0 , 0 , 0 , 1 );
+		glClear( GL_COLOR_BUFFER_BIT );
 		PEND( );
 		return;
 	}
+	program_.enable( );
 
-#if 0
-	glBindProgramPipeline( pipeline_ );
-#else
-	program_.activate( );
-#endif
 	glClearColor( 0 , 0 , 0 , 1 );
 	glClear( GL_COLOR_BUFFER_BIT );
 	enum {
@@ -68,18 +52,19 @@ void T_Raymarcher::render( )
 		U_RAYMARCHER		= 7 ,
 	};
 
-#if 0
-	glProgramUniform1f( program_.id( ) , U_TIME , 0 );
-	glProgramUniform2f( program_.id( ) , U_RESOLUTION , rtOutput_.width( ) , rtOutput_.height( ) );
+#if 1
+	const auto id( program_.program( E_ShaderType::FRAGMENT ) );
+	glProgramUniform1f( id , U_TIME , 0 );
+	glProgramUniform2f( id , U_RESOLUTION , rtOutput_.width( ) , rtOutput_.height( ) );
 
-	glProgramUniform3fv( program_.id( ) , U_CAM_POS , 1 , &camera_.pos.x );
-	glProgramUniform3fv( program_.id( ) , U_LOOK_AT , 1 , &camera_.lookAt.x );
-	glProgramUniform3fv( program_.id( ) , U_CAM_UP , 1 , &camera_.up.x );
-	glProgramUniform1f( program_.id( ) , U_NEAR_PLANE , camera_.np );
+	glProgramUniform3fv( id , U_CAM_POS , 1 , &camera_.pos.x );
+	glProgramUniform3fv( id , U_LOOK_AT , 1 , &camera_.lookAt.x );
+	glProgramUniform3fv( id , U_CAM_UP , 1 , &camera_.up.x );
+	glProgramUniform1f( id , U_NEAR_PLANE , camera_.np );
 
-	glProgramUniform3f( program_.id( ) , U_LIGHT_DIR , 0 , 1 , -1 );
+	glProgramUniform3f( id , U_LIGHT_DIR , 0 , 1 , -1 );
 
-	glProgramUniform4f( program_.id( ) , U_RAYMARCHER , rmIterations , rmStep ,
+	glProgramUniform4f( id , U_RAYMARCHER , rmIterations , rmStep ,
 			rmEpsilon , rmMaxDist );
 
 	glDrawArrays( GL_TRIANGLE_STRIP , 0 , 4 );
diff --git a/raymarcher.hh b/raymarcher.hh
index 57b7d3a..3d7958a 100644
--- a/raymarcher.hh
+++ b/raymarcher.hh
@@ -1,7 +1,7 @@
 #pragma once
 
 #include "rendertarget.hh"
-#include "programs.hh"
+#include "shaders.hh"
 #include "camera.hh"
 
 
@@ -27,10 +27,8 @@ struct T_Raymarcher
     private:
 	T_Camera camera_;
 
-#if 0
-	GLuint pipeline_;
-#endif
-	T_ShaderProgram program_;
+	//T_ShaderProgram program_;
+	T_ShaderPipeline program_;
 
 	T_Texture txOutput_ , txDepth_;
 	T_Rendertarget rtOutput_;
diff --git a/shaders.cc b/shaders.cc
index a2ca3c7..a8b13e6 100644
--- a/shaders.cc
+++ b/shaders.cc
@@ -7,7 +7,7 @@ namespace {
 
 const std::regex PreprocDirective_( "^\\s*//!\\s*([a-z]+(\\s+([^\\s]+))*)\\s*$" );
 
-const std::regex GLSLErrorNv_( "^\\d+\\((\\d+)\\) : " );
+const std::regex GLSLErrorNv_( "^[0-9]*\\(([0-9]+).*$" );
 
 const std::map< std::string , E_ShaderInput > InputTypes_( ([] {
 	std::map< std::string , E_ShaderInput > t;
@@ -260,6 +260,28 @@ void T_ShaderPipeline::enable( ) const
 	}
 }
 
+GLuint T_ShaderPipeline::program(
+		__rd__ const E_ShaderType program ) const
+{
+	if ( !valid( ) ) {
+		return 0;
+	}
+
+	auto const& sm( Globals::Shaders( ) );
+	auto const& pl( sm.pipelines_[ smIndex_ ] );
+	for ( auto const& pn : pl.programs ) {
+		auto pos( sm.programIndex_.find( pn ) );
+		if ( pos == sm.programIndex_.end( ) ) {
+			continue;
+		}
+		auto& p( sm.programs_[ pos->second ] );
+		if ( p.code.type == program ) {
+			return p.id;
+		}
+	}
+	return 0;
+}
+
 
 /*= T_CodeBuilder_ ===========================================================*/
 
@@ -312,6 +334,13 @@ bool T_CodeBuilder_::buildCode( )
 	if ( !main ) {
 		return false;
 	}
+	if ( main->type == E_ShaderInput::CHUNK
+			|| main->type == E_ShaderInput::LIBRARY ) {
+		code.errors.push_back( T_ShaderError{
+				name , 0 , "invalid type" } );
+	} else {
+		code.type = E_ShaderType( int( main->type ) - 2 );
+	}
 	cname = name;
 	current = main;
 
@@ -392,7 +421,7 @@ void T_CodeBuilder_::include(
 	cname = nname;
 	current = isi;
 	cpos = UINT32_MAX;
-	pos[ cname ] = 1;
+	pos[ cname ] = 0;
 }
 
 void T_CodeBuilder_::next( )
@@ -450,6 +479,8 @@ T_ShaderPipeline T_ShaderManager::pipeline(
 
 void T_ShaderManager::update( )
 {
+	inputs_.clear( );
+
 	// Check for missing files
 	for ( auto it = missing_.begin( ) ; it != missing_.end( ) ; ++ it ) {
 		const bool exists( ([] ( std::string const& name ) -> bool {
@@ -475,6 +506,9 @@ void T_ShaderManager::update( )
 			resetProgram( pr );
 		}
 	}
+	if ( updates_.empty( ) ) {
+		return;
+	}
 
 	// Reset pipelines affected by the programs above
 	for ( auto plid : pipelines ) {
@@ -489,12 +523,18 @@ void T_ShaderManager::update( )
 	for ( auto const& name : updates_ ) {
 		auto& pr( programs_[ programIndex_[ name ] ] );
 		initProgram( pr );
+		for ( auto const& e : pr.code.errors ) {
+			printf( "%s:%d: %s\n" , e.source.c_str( ) , e.line ,
+					e.error.c_str( ) );
+		}
 	}
 
 	// Try to initialise all affected pipelines
 	for ( auto plid : pipelines ) {
 		initPipeline( pipelines_[ plid ] );
 	}
+
+	updates_.clear( );
 }
 
 
@@ -540,6 +580,9 @@ void T_ShaderManager::loadProgram(
 	program.references.insert( pipeline );
 	program.id = 0;
 	initProgram( program );
+	for ( auto const& e : program.code.errors ) {
+		printf( "%s:%d: %s\n" , e.source.c_str( ) , e.line , e.error.c_str( ) );
+	}
 }
 
 bool T_ShaderManager::useExistingProgram(
@@ -618,6 +661,7 @@ void T_ShaderManager::initPipeline(
 {
 	assert( pipeline.id == 0 );
 
+	printf( "init pipeline %s\n" , pipeline.idString.c_str( ) );
 	constexpr auto nst{ size_t( E_ShaderType::__COUNT__ ) };
 	int32_t programs[ nst ];
 	for ( auto i = 0u ; i < nst ; i ++ ) {
@@ -629,6 +673,7 @@ void T_ShaderManager::initPipeline(
 		auto const& program( programs_[ pid ] );
 		if ( programs[ int( program.code.type ) ] != -1
 				|| program.id == 0 ) {
+			printf( "... failed\n" );
 			return;
 		}
 		programs[ int( program.code.type ) ] = pid;
@@ -648,10 +693,12 @@ void T_ShaderManager::initPipeline(
 	}
 	GL_CHECK({
 		glDeleteProgramPipelines( 1 , &id );
+		printf( "... failed\n" );
 		return;
 	});
 
 	pipeline.id = id;
+	printf( "... success\n" );
 }
 
 
@@ -662,6 +709,7 @@ void T_ShaderManager::initProgram(
 
 	// Build the code
 	auto name( program.name );
+	printf( "init program %s\n" , program.name.c_str( ) );
 	auto& code( program.code );
 	T_CodeBuilder_ cb( [this]( std::string const& n ) { return getInput( n ); } ,
 			name , code );
@@ -678,7 +726,7 @@ void T_ShaderManager::initProgram(
 			} );
 	for ( auto entry : code.files ) {
 		if ( entry.second ) {
-			program.watch->watch( entry.first );
+			program.watch->watch( "shaders/" + entry.first );
 		} else {
 			missing_[ entry.first ].insert( name );
 		}
@@ -725,6 +773,7 @@ void T_ShaderManager::initProgram(
 	glGetProgramiv( sid , GL_LINK_STATUS , &lnk );
 	if ( lnk ) {
 		program.id = sid;
+		printf( "... success\n" );
 	} else {
 		glDeleteProgram( sid );
 	}
@@ -739,7 +788,7 @@ void T_ShaderManager::parseGLSLError(
 	std::cmatch m;
 	uint32_t rawLine;
 	if ( std::regex_match( errorLine , m , GLSLErrorNv_ ) ) {
-		rawLine = atoi( m[ 0 ].str( ).c_str( ) );
+		rawLine = atoi( m[ 1 ].str( ).c_str( ) );
 	} else {
 		rawLine = 0;
 	}
@@ -752,7 +801,7 @@ void T_ShaderManager::parseGLSLError(
 
 	code.errors.push_back( T_ShaderError{
 			pos == 0 ? "*unknown*" : code.sources[ pos - 1 ] ,
-			pos == 0 ? 0 : ( rawLine - ( check + code.counts[ pos - 1 ] ) + code.starts[ pos - 1 ] ) ,
+			pos == 0 ? 0 : ( rawLine + code.counts[ pos - 1 ] - check + code.starts[ pos - 1 ] ) ,
 			errorLine } );
 }
 
diff --git a/shaders.hh b/shaders.hh
index f2f64bb..589a8ce 100644
--- a/shaders.hh
+++ b/shaders.hh
@@ -88,6 +88,8 @@ struct T_ShaderPipeline
 	bool valid( ) const noexcept;
 	void enable( ) const;
 
+	GLuint program( __rd__ const E_ShaderType program ) const;
+
     private:
 	explicit T_ShaderPipeline(
 			__rd__ const int32_t index );
diff --git a/shaders/fsquad.glsl b/shaders/fullscreen.v.glsl
similarity index 90%
rename from shaders/fsquad.glsl
rename to shaders/fullscreen.v.glsl
index b64e5b0..b3da9d2 100644
--- a/shaders/fsquad.glsl
+++ b/shaders/fullscreen.v.glsl
@@ -1,5 +1,7 @@
 #version 450 core
 
+//! type vertex
+
 out gl_PerVertex {
 	vec4 gl_Position;
 };
diff --git a/shaders/pbr.glsl b/shaders/pbr.glsl
index 4937b2d..8e28a35 100644
--- a/shaders/pbr.glsl
+++ b/shaders/pbr.glsl
@@ -1,3 +1,5 @@
+//! type library
+
 struct T_PBRMaterialOld
 {
 	vec3 cAlbedo, cSpecular;
diff --git a/shaders/raymarch-header.glsl b/shaders/raymarch-header.glsl
index 0ccd569..70900fe 100644
--- a/shaders/raymarch-header.glsl
+++ b/shaders/raymarch-header.glsl
@@ -1,5 +1,3 @@
-#version 450
-
 layout( location = 0 ) uniform float u_Time;
 layout( location = 1 ) uniform vec2 u_Resolution;
 layout( location = 2 ) uniform vec3 u_CamPos;
diff --git a/shaders/scene.f.glsl b/shaders/scene.f.glsl
new file mode 100644
index 0000000..b8fa5d4
--- /dev/null
+++ b/shaders/scene.f.glsl
@@ -0,0 +1,7 @@
+#version 450 core
+//! type fragment
+//! include raymarch-header.glsl
+//! include pbr.glsl
+//! include blinn-phong.glsl
+//! include map.glsl
+//! include raymarcher.glsl