     vec4 vp_clip      = R2_view.transform_projection * vp_eye;
     vec4 vp_clip_log  = vec4 (vp_clip.xy, R2_logDepthEncodeFull (vp_clip.w, R2_view.depth_coefficient), vp_clip.w);
     vec2 vp_uv        = vec2 (1.0, 0.0);
-    vec3 vp_normal    = vec3 (0.0, 0.0, 1.0);
-    vec3 vp_tangent   = vec3 (1.0, 0.0, 0.0);
-    vec3 vp_bitangent = vec3 (0.0, 1.0, 0.0);
 
     R2_vertex_data = R2_vertex_data_t(
       vp_eye,

    vec4 vp_clip      = R2_view.transform_projection * vp_eye;
    vec4 vp_clip_log  = vec4 (vp_clip.xy, R2_logDepthEncodeFull (vp_clip.w, R2_view.depth_coefficient), vp_clip.w);
    vec2 vp_uv        = vec2 (0.0, 1.0);
    vec3 vp_normal    = vec3 (0.0, 0.0, 1.0);
    vec3 vp_tangent   = vec3 (1.0, 0.0, 0.0);
    vec3 vp_bitangent = vec3 (0.0, 1.0, 0.0);

    R2_vertex_data = R2_vertex_data_t(
      vp_eye,

    vec4 vp_clip      = R2_view.transform_projection * vp_eye;
    vec4 vp_clip_log  = vec4 (vp_clip.xy, R2_logDepthEncodeFull (vp_clip.w, R2_view.depth_coefficient), vp_clip.w);
    vec2 vp_uv        = vec2 (1.0, 1.0);

    R2_vertex_data = R2_vertex_data_t(
      vp_eye,
