Start day 26 Advanced Data and Advanced GLSL.

26-advanced-data-glsl/assets/backpack/backpack.mtl

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+# Blender MTL File: 'None'
+# Material Count: 1
+
+newmtl Scene_-_Root
+Ns 225.000000
+Ka 1.000000 1.000000 1.000000
+Kd 0.800000 0.800000 0.800000
+Ks 0.500000 0.500000 0.500000
+Ke 0.0 0.0 0.0
+Ni 1.450000
+d 1.000000
+illum 2
+map_Kd diffuse.jpg
+map_Bump normal.png
+map_Ks specular.jpg
+

26-advanced-data-glsl/assets/backpack/source_attribution.txt

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+Model by Berk Gedik, from: https://sketchfab.com/3d-models/survival-guitar-backpack-low-poly-799f8c4511f84fab8c3f12887f7e6b36
+
+Modified material assignment (Joey de Vries) for easier load in OpenGL model loading chapter, and renamed albedo to diffuse and metallic to specular to match non-PBR lighting setup.

26-advanced-data-glsl/assets/crate.mtl

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+# Made in Blockbench 5.1.6
+newmtl m_cd2bce81-4f84-6efd-a971-2b9e91f19e2f
+map_Kd container2.png
+newmtl none

26-advanced-data-glsl/assets/crate.obj

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+# Made in Blockbench 5.1.6
+mtllib crate.mtl
+
+o cube
+v 0.1875 0.4375 0.375
+v 0.1875 0.4375 -0.0625
+v 0.1875 0 0.375
+v 0.1875 0 -0.0625
+v -0.25 0.4375 -0.0625
+v -0.25 0.4375 0.375
+v -0.25 0 -0.0625
+v -0.25 0 0.375
+vt 0 1
+vt 1 1
+vt 1 0
+vt 0 0
+vt 0 1
+vt 1 1
+vt 1 0
+vt 0 0
+vt 0 1
+vt 1 1
+vt 1 0
+vt 0 0
+vt 0 1
+vt 1 1
+vt 1 0
+vt 0 0
+vt 0 1
+vt 1 1
+vt 1 0
+vt 0 0
+vt 0 1
+vt 1 1
+vt 1 0
+vt 0 0
+vn 0 0 -1
+vn 1 0 0
+vn 0 0 1
+vn -1 0 0
+vn 0 1 0
+vn 0 -1 0
+usemtl m_cd2bce81-4f84-6efd-a971-2b9e91f19e2f
+f 4/4/1 7/3/1 5/2/1 2/1/1
+f 3/8/2 4/7/2 2/6/2 1/5/2
+f 8/12/3 3/11/3 1/10/3 6/9/3
+f 7/16/4 8/15/4 6/14/4 5/13/4
+f 6/20/5 1/19/5 2/18/5 5/17/5
+f 7/24/6 4/23/6 3/22/6 8/21/6