(1) MatNode

float ambient_red float ambient_green float ambient_blue float ambient_alpha	ambient color 0 ambient_* 1 If the user will not be setting the values, please set 1.0 as the default for all values.
float emission_red float emission_green float emission_blue float emission_alpha	emission color 0 emission_* 1
float diffuse_red float diffuse_green float diffuse_blue float diffuse_alpha	diffuse color 0 diffuse_* 1 If the user will not be setting the values, please set 1.0 as the default for all values.
u32 external_local_light_file_name_index	When local light references an external file, that file name is described with an ExternalNameList index number. Please do not include the directory name etc. when describing the file name. If an external file is not referenced, please describe with 0xffffffff.
u32 external_local_light_name_index	When local light references and external file, that Light name is described with an ExternalNameList index number. If an external file is not referenced, please describe with 0xffffffff.
u32 external_tex_num	Describes the external file reference Tex number.
u32 prim_color_anim_num	Describe the PrimColorAnim number if animating primitive colors. If not animating, please set prim_color_animation_num = 0x0. Also note that if animation is being done, the normal prim_red, prim_green, prim_blue, prim_alpha are not used.
u32 external_tex_file_name_index	When Tex references an external file, the referenced file name is specified with an ExternalNameList index number. Please do not include the directory name etc. when describing the file name. This field is not described when an external file is not referenced (external_tex_num = 0).
u32 external_tex_name_index	When Tex references an external file, that Tex name is described with an ExternalNameList index number.
PrimColorAnim	This is the area describing the primitive color for each key. The are is not described when prim_color_anim_num = 0x0.
*_for_fog	*_for_fog data in a Mat node indicate the attributes to be handled in scenes which use fog. The contents of the data are similar to those data without _for_fog attached.

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u32 interpolation_type	Describes the interpolation type from this key to the next. The following flags are defined: NIFF2_INTERPOLATION_TYPE_CONST 0x00000000 NIFF2_INTERPOLATION_TYPE_LINEAR 0x00000002 NIFF2_INTERPOLATION_TYPE_CONST retains the data from this key to the next key. NIFF2_INTERPOLATION_TYPE_LINEAR performs linear interpolation from this key to the next key. Please set the same value for each interpolation_type inside every PrimColorAnim and PrimColorAnimForFog.
u32 key	Describes the Key value.
float prim_color_anim_red float prim_color_anim_green float prim_color_anim_blue float prim_color_anim_alpha	primitive color 0 prim_color_anim_* 1

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