Actually added ui3d shader

res/shaders/ui3d.glslf

@@ -0,0 +1,9 @@
+in vec2 a_textureCoord;
+in vec4 a_color;
+out vec4 f_color;
+
+uniform sampler2D u_texture;
+
+void main(){
+	f_color = a_color * texture(u_texture, a_textureCoord);
+}

res/shaders/ui3d.glslv

@@ -0,0 +1,14 @@
+layout (location = 0) in vec3 v_position;
+layout (location = 1) in vec2 v_textureCoord;
+layout (location = 2) in vec4 v_color;
+
+out vec2 a_textureCoord;
+out vec4 a_color;
+
+uniform mat4 u_projview;
+
+void main(){
+	a_textureCoord = v_textureCoord;
+	a_color = v_color;
+	gl_Position = u_projview * vec4(v_position, 1.0);
+}