Parker Duren

• Paint your model in Blender via Vertex Paint mode

• Export out the model to a .fbx. Default settings should be okay, but look out for "Apply Modifiers" being checked for sure.

• Drop your .fbx in Unity. Shouldn't need to touch any import settings.

• Create a new file, probably drop it in a Shaders folder, and pop in some custom shader code that should allow the Vertex Painting. Save as a .shader:


                                Shader "Custom/VertexColor"
                                {
                                    Properties {}
                                    SubShader {
                                        Tags { "RenderType"="Opaque" }
                                        LOD 100

                                        Pass {
                                            CGPROGRAM
                                            #pragma vertex vert
                                            #pragma fragment frag
                                            #include "UnityCG.cginc"

                                            struct appdata {
                                                float4 vertex : POSITION;
                                                float4 color : COLOR;
                                            };

                                            struct v2f {
                                                float4 pos : SV_POSITION;
                                                float4 color : COLOR;
                                            };

                                            v2f vert (appdata v) {
                                                v2f o;
                                                o.pos = UnityObjectToClipPos(v.vertex);
                                                o.color = v.color;
                                                return o;
                                            }

                                            fixed4 frag (v2f i) : SV_Target {
                                                return i.color;
                                            }
                                            ENDCG
                                        }
                                    }
                                }

• Apply your custom shader to a material in Unity

• Apply the material with the custom shader to your fbx after dropping the fbx/prefab in your Unity scene

voila!

Use vertex painted Blender model in Unity

Blender 4.2.1 ||| Unity 2022.3.44