GLSL source for fragment shader 2434:
#version 120
#define SHADER_MODEL_2
#ifndef GL_ARB_half_float_pixel
#define half float
#define half2 vec2
#define half3 vec3
#define half4 vec4
#endif
#define NG3D_PLATFORM_LINUX
#define NG3D_ARB_texture_non_power_of_two
#define samplerRT sampler2D
#define textureRT texture2D
#define NG3D_MAX_HW_BONES 48
#define _EMMISIVE
#line 0
#extension GL_ARB_texture_rectangle : enable
#pragma optionNV(fastmath on)
#pragma optionNV(fastprecision on)

half GetShadowMapFactor(vec4 vPositionWS);
vec3 GetSpecularLighting(vec3 Normal, vec3 EyeDir, float specPower);

uniform vec4 CameraPosition;
uniform vec4 WorldOffset;

uniform mat4 ViewMatrix;
uniform vec4 FrustumPlanes;
varying vec3 wPos;

uniform samplerRT GBuffer0;
uniform samplerRT GBuffer1;
uniform samplerRT GBuffer2;
uniform samplerRT GBuffer3;
uniform samplerRT LinearDepth;

void GBuffer_Set(vec3 Normal, vec3 Color, float SpecPower, float SpecFactor, vec3 Accum, float AO)
{
	//float depth = abs((ViewMatrix * vec4(wPos, 1.0)).z) / FrustumPlanes.y;
	gl_FragData[0] = vec4(Normal, SpecPower);
	gl_FragData[1] = vec4(Color, SpecFactor);
	gl_FragData[2] = vec4(Accum, AO);
}

void GBuffer_Get(out vec3 Normal, out vec3 Color, out float SpecPower, out float SpecFactor, out vec3 Accum, out float AO)
{
	vec4 GB0, GB1, GB2;//, GB3;
	
	GB0 = textureRT(GBuffer0, gl_TexCoord[0].xy);
	GB1 = textureRT(GBuffer1, gl_TexCoord[0].xy);
	GB2 = textureRT(GBuffer2, gl_TexCoord[0].xy);
	//GB3 = textureRT(GBuffer3, gl_TexCoord[0].xy);
	
	Normal = GB0.rgb;
	Color = GB1.rgb;
	SpecPower = GB0.a;
	SpecFactor = GB1.a;
	Accum = GB2.rgb;
	AO = GB2.a;
}

vec4 GBuffer_GetPositionES(vec2 texCoord, vec4 screenCoords)
{
	float fDepth = textureRT(LinearDepth, texCoord).r;
	vec3 vPositionES = screenCoords.xyz * fDepth;
	return vec4(vPositionES, 1.0);
}

vec3 GBuffer_GetNormalWS(in vec2 texCoord)
{
	return textureRT(GBuffer0, texCoord).rgb;
}

void GBuffer_CheckWriteMask(in vec2 texCoord)
{
	if(textureRT(LinearDepth, texCoord).r >= 0.999999999)
  	discard;
}

bool GBuffer_GetWriteMask(in vec2 texCoord)
{
	return abs(textureRT(LinearDepth, texCoord).r) >= 0.999999999;
}


GLSL IR for shader 2434:
(
(declare (uniform ) sampler2D LinearDepth)
(declare (uniform ) sampler2D GBuffer3)
(declare (uniform ) sampler2D GBuffer2)
(declare (uniform ) sampler2D GBuffer1)
(declare (uniform ) sampler2D GBuffer0)
(declare (in ) vec3 wPos)
(declare (uniform ) vec4 FrustumPlanes)
(declare (uniform ) mat4 ViewMatrix)
(declare (uniform ) vec4 WorldOffset)
(declare (uniform ) vec4 CameraPosition)
(declare (in ) vec4 gl_FragCoord)
(declare (in ) bool gl_FrontFacing)
(declare (out ) vec4 gl_FragColor)
(declare (out ) float gl_FragDepth)
(declare (in ) vec4 gl_Color)
(declare (in ) vec4 gl_SecondaryColor)
(declare (in ) float gl_FogFragCoord)
(declare (uniform ) mat4 gl_ModelViewMatrix)
(declare (uniform ) mat4 gl_ProjectionMatrix)
(declare (uniform ) mat4 gl_ModelViewProjectionMatrix)
(declare (uniform ) mat3 gl_NormalMatrix)
(declare (uniform ) mat4 gl_ModelViewMatrixInverse)
(declare (uniform ) mat4 gl_ProjectionMatrixInverse)
(declare (uniform ) mat4 gl_ModelViewProjectionMatrixInverse)
(declare (uniform ) mat4 gl_ModelViewMatrixTranspose)
(declare (uniform ) mat4 gl_ProjectionMatrixTranspose)
(declare (uniform ) mat4 gl_ModelViewProjectionMatrixTranspose)
(declare (uniform ) mat4 gl_ModelViewMatrixInverseTranspose)
(declare (uniform ) mat4 gl_ProjectionMatrixInverseTranspose)
(declare (uniform ) mat4 gl_ModelViewProjectionMatrixInverseTranspose)
(declare (uniform ) float gl_NormalScale)
(declare (uniform ) gl_LightModelParameters gl_LightModel)
(declare (uniform ) vec2 gl_BumpRotMatrix0MESA)
(declare (uniform ) vec2 gl_BumpRotMatrix1MESA)
(declare (uniform ) vec4 gl_FogParamsOptimizedMESA)
(declare () int gl_MaxLights)
(declare () int gl_MaxClipPlanes)
(declare () int gl_MaxTextureUnits)
(declare () int gl_MaxTextureCoords)
(declare () int gl_MaxVertexAttribs)
(declare () int gl_MaxVertexUniformComponents)
(declare () int gl_MaxVaryingFloats)
(declare () int gl_MaxVertexTextureImageUnits)
(declare () int gl_MaxCombinedTextureImageUnits)
(declare () int gl_MaxTextureImageUnits)
(declare () int gl_MaxFragmentUniformComponents)
(declare (uniform ) (array mat4 8) gl_TextureMatrix)
(declare (uniform ) (array mat4 8) gl_TextureMatrixInverse)
(declare (uniform ) (array mat4 8) gl_TextureMatrixTranspose)
(declare (uniform ) (array mat4 8) gl_TextureMatrixInverseTranspose)
(declare (uniform ) gl_DepthRangeParameters gl_DepthRange)
(declare (uniform ) (array vec4 8) gl_ClipPlane)
(declare (uniform ) gl_PointParameters gl_Point)
(declare (uniform ) gl_MaterialParameters gl_FrontMaterial)
(declare (uniform ) gl_MaterialParameters gl_BackMaterial)
(declare (uniform ) (array gl_LightSourceParameters 8) gl_LightSource)
(declare (uniform ) gl_LightModelProducts gl_FrontLightModelProduct)
(declare (uniform ) gl_LightModelProducts gl_BackLightModelProduct)
(declare (uniform ) (array gl_LightProducts 8) gl_FrontLightProduct)
(declare (uniform ) (array gl_LightProducts 8) gl_BackLightProduct)
(declare (uniform ) (array vec4 8) gl_TextureEnvColor)
(declare (uniform ) (array vec4 8) gl_EyePlaneS)
(declare (uniform ) (array vec4 8) gl_EyePlaneT)
(declare (uniform ) (array vec4 8) gl_EyePlaneR)
(declare (uniform ) (array vec4 8) gl_EyePlaneQ)
(declare (uniform ) (array vec4 8) gl_ObjectPlaneS)
(declare (uniform ) (array vec4 8) gl_ObjectPlaneT)
(declare (uniform ) (array vec4 8) gl_ObjectPlaneR)
(declare (uniform ) (array vec4 8) gl_ObjectPlaneQ)
(declare (uniform ) gl_FogParameters gl_Fog)
(declare (uniform ) (array vec4 33) gl_CurrentAttribVertMESA)
(declare (uniform ) (array vec4 32) gl_CurrentAttribFragMESA)
(declare (in ) (array vec4 0) gl_TexCoord)
(declare () int gl_MaxDrawBuffers)
(declare (out ) (array vec4 8) gl_FragData)
(declare (in ) vec2 gl_PointCoord)
(function GetShadowMapFactor
  (signature float
    (parameters
      (declare (in ) vec4 vPositionWS)
    )
    (
    ))

)

(function GetSpecularLighting
  (signature vec3
    (parameters
      (declare (in ) vec3 Normal)
      (declare (in ) vec3 EyeDir)
      (declare (in ) float specPower)
    )
    (
    ))

)

(function GBuffer_Set
  (signature void
    (parameters
      (declare (in ) vec3 Normal)
      (declare (in ) vec3 Color)
      (declare (in ) float SpecPower)
      (declare (in ) float SpecFactor)
      (declare (in ) vec3 Accum)
      (declare (in ) float AO)
    )
    (
      (declare (temporary ) vec4 vec_ctor)
      (assign  (xyz) (var_ref vec_ctor)  (var_ref Normal) ) 
      (assign  (w) (var_ref vec_ctor)  (var_ref SpecPower) ) 
      (assign  (xyzw) (array_ref (var_ref gl_FragData) (constant int (0)) )  (var_ref vec_ctor) ) 
      (declare (temporary ) vec4 vec_ctor@4300)
      (assign  (xyz) (var_ref vec_ctor@4300)  (var_ref Color) ) 
      (assign  (w) (var_ref vec_ctor@4300)  (var_ref SpecFactor) ) 
      (assign  (xyzw) (array_ref (var_ref gl_FragData) (constant int (1)) )  (var_ref vec_ctor@4300) ) 
      (declare (temporary ) vec4 vec_ctor@4301)
      (assign  (xyz) (var_ref vec_ctor@4301)  (var_ref Accu[08/10/2012 17:26:37] [ShaderGL][shader_gl_parser.cpp(392)] Program <gbufferskinning_pass_0> (material.basic_ts_emmisive) info log: 
error: linking with uncompiled shader
m) ) 
      (assign  (w) (var_ref vec_ctor@4301)  (var_ref AO) ) 
      (assign  (xyzw) (array_ref (var_ref gl_FragData) (constant int (2)) )  (var_ref vec_ctor@4301) ) 
    ))

)

(function GBuffer_Get
  (signature void
    (parameters
      (declare (out ) vec3 Normal)
      (declare (out ) vec3 Color)
      (declare (out ) float SpecPower)
      (declare (out ) float SpecFactor)
      (declare (out ) vec3 Accum)
      (declare (out ) float AO)
    )
    (
      (declare () vec4 GB1)
      (declare () vec4 GB0)
      (declare (temporary ) vec4 texture2D_retval)
      (call texture2D (var_ref texture2D_retval)  ((var_ref GBuffer0) (swiz xy (array_ref (var_ref gl_TexCoord) (constant int (0)) ) )))

      (assign  (xyzw) (var_ref GB0)  (var_ref texture2D_retval) ) 
      (declare (temporary ) vec4 texture2D_retval@4302)
      (call texture2D (var_ref texture2D_retval@4302)  ((var_ref GBuffer1) (swiz xy (array_ref (var_ref gl_TexCoord) (constant int (0)) ) )))

      (assign  (xyzw) (var_ref GB1)  (var_ref texture2D_retval@4302) ) 
      (declare (temporary ) vec4 texture2D_retval@4303)
      (call texture2D (var_ref texture2D_retval@4303)  ((var_ref GBuffer2) (swiz xy (array_ref (var_ref gl_TexCoord) (constant int (0)) ) )))

      (assign  (xyz) (var_ref Normal)  (swiz xyz (var_ref GB0) )) 
      (assign  (xyz) (var_ref Color)  (swiz xyz (var_ref GB1) )) 
      (assign  (x) (var_ref SpecPower)  (swiz w (var_ref GB0) )) 
      (assign  (x) (var_ref SpecFactor)  (swiz w (var_ref GB1) )) 
      (assign  (xyz) (var_ref Accum)  (swiz xyz (var_ref texture2D_retval@4303) )) 
      (assign  (x) (var_ref AO)  (swiz w (var_ref texture2D_retval@4303) )) 
    ))

)

(function texture2D
  (signature vec4
    (parameters
      (declare (in ) sampler2D sampler)
      (declare (in ) vec2 P)
    )
    (
    ))

)

(function GBuffer_GetPositionES
  (signature vec4
    (parameters
      (declare (in ) vec2 texCoord)
      (declare (in ) vec4 screenCoords)
    )
    (
      (declare (temporary ) vec4 texture2D_retval)
      (call texture2D (var_ref texture2D_retval)  ((var_ref LinearDepth) (var_ref texCoord) ))

      (declare (temporary ) vec4 vec_ctor)
      (assign  (w) (var_ref vec_ctor)  (constant float (1.000000)) ) 
      (assign  (xyz) (var_ref vec_ctor)  (expression vec3 * (swiz xyz (var_ref screenCoords) )(swiz x (var_ref texture2D_retval) )) ) 
      (return (var_ref vec_ctor) )
    ))

)

(function GBuffer_GetNormalWS
  (signature vec3
    (parameters
      (declare (in ) vec2 texCoord)
    )
    (
      (declare (temporary ) vec4 texture2D_retval)
      (call texture2D (var_ref texture2D_retval)  ((var_ref GBuffer0) (var_ref texCoord) ))

      (return (swiz xyz (var_ref texture2D_retval) ))
    ))

)

(function GBuffer_CheckWriteMask
  (signature void
    (parameters
      (declare (in ) vec2 texCoord)
    )
    (
      (declare (temporary ) vec4 texture2D_retval)
      (call texture2D (var_ref texture2D_retval)  ((var_ref LinearDepth) (var_ref texCoord) ))

      (if (expression bool >= (swiz x (var_ref texture2D_retval) )(constant float (1.000000)) ) (
        (discard )
      )
      ())

    ))

)

(function GBuffer_GetWriteMask
  (signature bool
    (parameters
      (declare (in ) vec2 texCoord)
    )
    (
      (declare (temporary ) vec4 texture2D_retval)
      (call texture2D (var_ref texture2D_retval)  ((var_ref LinearDepth) (var_ref texCoord) ))

      (declare (temporary ) float abs_retval)
      (call abs (var_ref abs_retval)  ((swiz x (var_ref texture2D_retval) )))

      (return (expression bool >= (var_ref abs_retval) (constant float (1.000000)) ) )
    ))

)

(function abs
  (signature float
    (parameters
      (declare (in ) float arg0)
    )
    (
    ))

)


)

GLSL shader program 2432 failed to link
GLSL shader program 2432 info log:
error: linking with uncompiled shader
[08/10/2012 17:26:37] [logger.cpp(72)] Shader material.basic_ts_emmisive link failed
[08/10/2012 17:26:37] [logger.cpp(72)] GL_INVALID_OPERATION in glGetUniformLocation(program not linked)
[08/10/2012 17:26:37] [logger.cpp(72)] GL_INVALID_OPERATION in glGetUniformLocation(program not linked)
[08/10/2012 17:26:37] [logger.cpp(72)] GL_INVALID_OPERATION in glGetUniformLocation(program not linked)
[08/10/2012 17:26:37] [logger.cpp(72)] GL_INVALID_OPERATION in glGetUniformLocation(program not linked)
[08/10/2012 17:26:37] [logger.cpp(72)] GL_INVALID_OPERATION in glGetUniformLocation(program not linked)
[08/10/2012 17:26:37] [logger.cpp(72)] GL_INVALID_OPERATION in glGetUniformLocation(program not linked)
[08/10/2012 17:26:37] [logger.cpp(72)] GL_INVALID_OPERATION in glGetUniformLocation(program not linked)
[08/10/2012 17:26:37] [logger.cpp(72)] GL_INVALID_OPERATION in glGetUniformLocation(program not linked)
[08/10/2012 17:26:37] [logger.cpp(72)] GL_INVALID_OPERATION in glGetUniformLocation(program not linked)
[08/10/2012 17:26:37] [logger.cpp(72)] GL_INVALID_OPERATION in glGetUniformLocation(program not linked)
[08/10/2012 17:26:37] [logger.cpp(72)] GL_INVALID_OPERATION in glGetUniformLocation(program not linked)
[08/10/2012 17:26:37] [logger.cpp(72)] GL_INVALID_OPERATION in glGetUniformLocation(program not linked)
[08/10/2012 17:26:37] [logger.cpp(72)] GL_INVALID_OPERATION in glGetUniformLocation(program not linked)
[08/10/2012 17:26:37] [logger.cpp(72)] GL_INVALID_OPERATION in glGetUniformLocation(program not linked)
[08/10/2012 17:26:37] [logger.cpp(72)] GL_INVALID_OPERATION in glGetUniformLocation(program not linked)
[08/10/2012 17:26:37] [logger.cpp(72)] GL_INVALID_OPERATION in glGetUniformLocation(program not linked)
[08/10/2012 17:26:37] [logger.cpp(72)] GL_INVALID_OPERATION in glGetUniformLocation(program not linked)
[08/10/2012 17:26:37] [logger.cpp(72)] GL_INVALID_OPERATION in glGetUniformLocation(program not linked)
[08/10/2012 17:26:37] [logger.cpp(72)] GL_INVALID_OPERATION in glGetUniformLocation(program not linked)
[08/10/2012 17:26:37] [logger.cpp(72)] GL_INVALID_OPERATION in glGetUniformLocation(program not linked)
[08/10/2012 17:26:37] [logger.cpp(72)] GL_INVALID_OPERATION in glGetUniformLocation(program not linked)
[08/10/2012 17:26:37] [logger.cpp(72)] GL_INVALID_OPERATION in glGetUniformLocation(program not linked)
[08/10/2012 17:26:37] [logger.cpp(72)] GL_INVALID_OPERATION in glGetUniformLocation(program not linked)
[08/10/2012 17:26:37] [logger.cpp(72)] GL_INVALID_OPERATION in glGetUniformLocation(program not linked)
[08/10/2012 17:26:37] [logger.cpp(72)] GL_INVALID_OPERATION in glGetUniformLocation(program not linked)
[08/10/2012 17:26:37] [logger.cpp(72)] GL_INVALID_OPERATION in glGetUniformLocation(program not linked)
[08/10/2012 17:26:37] [logger.cpp(72)] GL_INVALID_OPERATION in glGetUniformLocation(program not linked)
[08/10/2012 17:26:37] [logger.cpp(72)] GL_INVALID_OPERATION in glGetUniformLocation(program not linked)
[08/10/2012 17:26:37] [logger.cpp(72)] GL_INVALID_OPERATION in glGetUniformLocation(program not linked)
[08/10/2012 17:26:37] [logger.cpp(72)] GL_INVALID_OPERATION in glGetUniformLocation(program not linked)
[08/10/2012 17:26:37] [logger.cpp(72)] GL_INVALID_OPERATION in glGetUniformLocation(program not linked)
[08/10/2012 17:26:37] [logger.cpp(72)] GL_INVALID_OPERATION in glGetUniformLocation(program not linked)
[08/10/2012 17:26:37] [logger.cpp(72)] GL_INVALID_OPERATION in glGetUniformLocation(program not linked)
[08/10/2012 17:26:37] [logger.cpp(72)] GL_INVALID_OPERATION in glGetUniformLocation(program not linked)
[08/10/2012 17:26:37] [logger.cpp(72)] GL_INVALID_OPERATION in glGetUniformLocation(program not linked)
[08/10/2012 17:26:37] [logger.cpp(72)] GL_INVALID_OPERATION in glGetUniformLocation(program not linked)
[08/10/2012 17:26:37] [logger.cpp(72)] GL_INVALID_OPERATION in glGetUniformLocation(program not linked)
[08/10/2012 17:26:37] [logger.cpp(72)] GL_INVALID_OPERATION in glGetUniformLocation(program not linked)
[08/10/2012 17:26:37] [logger.cpp(72)] GL_INVALID_OPERATION in glGetUniformLocation(program not linked)
[08/10/2012 17:26:37] [logger.cpp(72)] GL_INVALID_OPERATION in glGetUniformLocation(program not linked)
[08/10/2012 17:26:37] [logger.cpp(72)] GL_INVALID_OPERATION in glGetUniformLocation(program not linked)
[08/10/2012 17:26:37] [logger.cpp(72)] GL_INVALID_OPERATION in glGetUniformLocation(program not linked)
[08/10/2012 17:26:37] [logger.cpp(72)] GL_INVALID_OPERATION in glGetUniformLocation(program not linked)
[08/10/2012 17:26:37] [logger.cpp(72)] GL_INVALID_OPERATION in glGetUniformLocation(program not linked)
[08/10/2012 17:26:37] [ShaderGL][shader_gl_parser.cpp(1512)] Shader material.basic_ts_emmisive validation failed