🎨 Arm Customization

This model includes a material designed for visual customization directly from Blender’s Shader Editor. 

You can add your own tattoos or personalized graphics easily using the included template.

🧬 Custom Skin Tone

In the Custom Skin section, you can easily change the skin tone or ethnicity.

How to use it:

• Check the Custom Tone box to enable tone customization.

• Choose a skin tone from the Skin Tones node (already connected):

  • • • Options like Albino, Fair, Olive, Golden Tan, Warm Brown, Deep Tan, Ebony, etc.

• Adjust the SSS (Subsurface Scattering) values if needed.

• Use the Light Areas Mask slider to control the intensity of light areas on darker skins (such as palms or knuckles).

🎛 Basic Adjustments

General visual controls grouped under the Basic Adjustments category in the shader:

• Hue – changes the hue of the skin tone.

• Saturation – increases or reduces the color saturation.

• Color Value – adjusts overall brightness.

• Roughness – controls the surface roughness.

• Specular – controls specular brightness.

• Specular Tint – allows you to tint the specular reflection.

• Subsurface Weight / Sheen Weight / Displacement – parameters to improve skin realism.

🖌️ Tattoo Section

All controls related to tattoos are grouped under the Tattoo category of the shader.

📁 Where is the template?

Inside the model’s textures folder, you will find the file:

• Arms-template.psd

Inside it, you will find a guide layer to correctly position your designs.

• The Left and Right arms are labeled separately.

• Visual references (guidelines for the forearm, knuckles, etc.) are included to help with precise placement.

🛠 How to Add Tattoos

Step by step:

1. Open the file Arms-template.psd from the “textures” folder using Photoshop or any compatible software.

2. Add your designs (tattoos, symbols, etc.) on a separate layer.

3. Disable the guide layer before saving, so it doesn't appear on the model.

4. Save the .PSD file normally (File > Save or Ctrl+S).

In Blender:

1. Open the Shader Editor of the arm.

2. Enable Custom Tattoos checkbox.

3. Switch to Material Preview or Rendered View mode to see the result in real time. 

(Optional) If you use a normal map or bump map, connect it to Tattoo Normal using a Normal Map or Bump node in between.
                                                                                                                                                                                                              

Ink Tint Option:

• You can select an aged ink color using the Ink Tint picker (greenish or bluish tones typical of old tattoos).

• Control its visibility with the Ink Tint Intensuty slider. 

⚠️ Recommendations

The node group is configured to preserve the arm’s realism. 

If you choose to adjust parameters like brightness, roughness, or subsurface, do so with caution.

🧠 The entire system is designed to make visual customization easy without risking damage to the original material.

💅 Nail Customization

This model includes an advanced system to visually customize each hand’s nails, directly from the shader. Everything is organized into a node group with separate categories and independent options for each hand.

🧭 What can you do?

• Change the general nail color.

• Customize each nail with individual designs using a PSD template.

• Add a painted relief effect.

• Adjust physical properties like roughness, specular or translucency.

🧰 Nail Shader Structure

The material is divided into control categories inside a node group. Here’s a breakdown of each part: 

✅ Enable Customization

Before applying any custom change, you must activate the initial checkboxes in the node group:

• Painted / Natural - Right Hand

• Painted / Natural - Left Hand

⚠️ If these aren’t activated, the customization settings will have no effect. You can enable one hand and leave the other in natural mode if you only want to customize one.

⚙️ Shader Categories

1. General Values

These settings affect all nails, whether customized or not:

• Roughness

• Specular

• Coat

• Coat Roughness

2.  Natural Nails

Controls for natural nails (without paint):

• Hue

• Saturation

• Color Value (brightness/darkness)

• Subsurface Weight

• Subsurface Scale

• Translucency

• Normal Strength

💡 Just like with the arms, it’s recommended to use these adjustments carefully to maintain realism and harmony with the skin tone.

3. Painted Nails

Options available only when customization is enabled:

• Base color selector (or image input for the PSD template)

• Metallic slider for a metallic finish

• Normal map input (you can connect the SimpleNoise relief node here)

• Normal Strength slider to control the depth of the detail

You can use a flat color or a custom image to design each nail independently.

🖌 Paint Relief Node

This node uses a simple noise pattern to simulate paint relief.

Connect it to the Normal input of the main group and adjust its sliders as desired. 

🖼 Nail Template

Inside the textures folder you’ll find the template:

• Nails-template.psd

It contains the exact coordinates for each nail on both hands.

How to use it:

1. Open the file in Photoshop or another compatible editor.

2. Add your designs or colors on a separate layer.

3. Save directly (File > Save or Ctrl+S).

4. Blender will automatically update the texture if it’s connected to the shader.

✅ Just like with the tattoos, do not edit the internal nodes. Only work with the template and connect it properly.

🔄 Not seeing the changes?

Blender doesn’t automatically update textures when editing an external image like a PSD template.

To see the changes reflected on the model:

1. Save the PSD file (Ctrl + S).

2. In Blender, temporarily switch to Solid View.

3. Then return to Material Preview or Rendered View.
   This will force the shader to update the texture.

🔁 This step is necessary for both the nail and tattoo templates.

🔗 If the textures aren’t showing correctly…

Make sure the texture files are properly linked.
Check the textures folder and refer to the basic Blender Basics documentation:

• Extract the textures folder into the same directory as the .blend file.

• Blender uses relative paths, so if the folder is located elsewhere, it won’t find the files.

You can easily relink textures from:

File > External Data > Find Missing Files.