By default, custom pass export tangent field

src/libRender/RadiumNBR/Renderer/Visualization.hpp

@@ -71,7 +71,7 @@ class NodeBasedRenderer_LIBRARY_API VisualizationController
         "else { finalColor = (diffColor + specColor) * max(lightDir.z, 0) \n"
         "       * lightContributionFrom(light, getWorldSpacePosition().xyz); }\n"
         "#ifdef EXPORT_VECTOR_FIELD\n"
-        "out_vector_field = vec4(getWorldSpaceTangent(), 1);\n"
+        "out_vector_field = vec4(getWorldSpaceTangent()*0.5+0.5, 1);\n"
         "#endif\n"
         "return vec4( finalColor, 1); \n"
         "}\n"};