blender-archive/source/blender/gpu/shaders/gpu_shader_instance_vert.glsl

uniform mat4 ViewProjectionMatrix;

/* ---- Instantiated Attrs ---- */
in vec3 pos;

/* ---- Per instance Attrs ---- */
in mat4 InstanceModelMatrix;

void main()
{
  gl_Position = ViewProjectionMatrix * (InstanceModelMatrix * vec4(pos, 1.0));
}