UPD: Use texture for coloring

assets/models/chess.mtl

@@ -1,12 +1,12 @@
-# Blender 5.2.0 LTS MTL File: 'chess.blend'
+# Blender 5.2.0 LTS MTL File: 'None'
 # www.blender.org
 
 newmtl Material.002
 Ns 735.817688
 Ka 1.000000 1.000000 1.000000
-Kd 0.800000 0.800000 0.800000
 Ks 0.500000 0.500000 0.500000
 Ke 0.000000 0.000000 0.000000
 Ni 1.450000
 d 1.000000
 illum 2
+map_Kd chess_blue.png

assets/shaders/basic.frag

@@ -1,7 +1,10 @@
 #version 460 core
 
+in vec2 pass_textureCoords;
+
+uniform sampler2D textureSampler;
 out vec4 fragColor;
 
 void main() {
-    fragColor = vec4(1.0, 0.5, 0.2, 1.0);
+    fragColor = texture(textureSampler, pass_textureCoords);
 }

assets/shaders/basic.vert

@@ -1,11 +1,19 @@
 #version 460 core
 layout(location = 0) in vec3 position;
+layout(location = 1) in vec3 normal;
+layout(location = 2) in vec2 textureCoords;
 
 uniform mat4 transformationMatrix;
 uniform mat4 projectionMatrix;
 uniform mat4 viewMatrix;
 
+out vec2 pass_textureCoords;
+out vec3 surfaceNormal;
+
 void main() {
     vec4 worldPosition = transformationMatrix * vec4(position, 1.0f);
     gl_Position = projectionMatrix * viewMatrix * worldPosition;
+    pass_textureCoords = textureCoords;
+
+    surfaceNormal = (transformationMatrix * vec4(normal , 0.f)).xyz;
 }