"out float frag_light;\n"
"void main() {\n"
"gl_Position = MVP * vec4(vtx_position, 1);\n"
"frag_color = vtx_color;\n"
"vtx_viewspace = (MV * vec4(vtx_position, 1)).xyz;\n"
"out float frag_light;\n"
"void main() {\n"
"gl_Position = MVP * vec4(vtx_position, 1);\n"
"frag_color = vtx_color;\n"
"vtx_viewspace = (MV * vec4(vtx_position, 1)).xyz;\n"