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				float specular[4];
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				float specular[4];
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				/// Specular exponent
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				/// Specular exponent
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				float shininess;
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				float shininess;
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        /// Index of refraction in the inverted normal direction ("inside")
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        float ior_in;
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        /// Index of refraction in the normal direction ("outside")
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        /// Index of refraction
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        float ior_out;
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        float ior;
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        /// Transmission filter
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        /// Transmission filter
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        float transmission[3];
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        float transmission[3];
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        /** Illumination model
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        /** Illumination model
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        bool has_texture;
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        bool has_texture;
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				std::string tex_path, tex_name;
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				std::string tex_path, tex_name;
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				int tex_id;
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				int tex_id;
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			Material():	name("default"),
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			Material():	name("default"),
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					 tex_path(""), tex_name(""), tex_id(-1)
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					 tex_path(""), tex_name(""), tex_id(-1), has_texture(false)
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						{
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						{
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                ior_in = 1.5f;
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                ior = 1.5f;
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                ior_out = 1.0f;
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								shininess = 0.0f;
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								shininess = 0.0f;
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								diffuse[0] = 0.8f;
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								diffuse[0] = 0.8f;
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								diffuse[1] = 0.8f;
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								diffuse[1] = 0.8f;
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								diffuse[2] = 0.8f;
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								diffuse[2] = 0.8f;
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								diffuse[3] = 1.0f;
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								diffuse[3] = 1.0f;