In this guide
Specify product finish by region, process, material and an identified physical reference. Use the render to communicate appearance intent, then connect that intent to the sample and acceptance method the supplier will use. A metallic-looking image does not define brushing direction, coating, texture or permissible variation.
Start with a region map and source revision. A product may combine coated metal, uncoated metal, molded plastic and printed markings. One global color name cannot describe every region correctly.
Make the finish schedule actionable
For each region, record the substrate, proposed process, physical sample ID, directional treatment where relevant and the person responsible for approval. State which decisions remain proposals. Do not use the name of a familiar finish as a substitute for the actual supplier’s capability and sample.
| Region | Required information | Review evidence |
|---|---|---|
| Brushed metal shell | Material, direction and finish process | Identified physical sample |
| Coated frame | Coating system and color reference | Approved coated sample |
| Molded grip | Resin proposal and surface treatment | Representative molded sample |
| Printed mark | Artwork revision and placement | Proof or production sample |
Control the comparison
Review the physical sample under the agreed viewing conditions. Keep the corresponding render’s camera, lighting and region assignment recorded. If the image and sample disagree, identify whether the cause is material interpretation, illumination, geometry or a changed reference.
Autodesk’s physical materials and appearances documentation distinguishes visual appearance overrides from engineering properties.1 A renderer’s appearance controls serve visualization; they are not a complete manufacturing finish schedule. Use the supplier’s process definition for production instructions.
Separate color, texture and directional effects
A darkened render may hide an incorrect roughness response. A close detail can reveal texture scale while a complete product view shows whether the finish is assigned to the correct region. Directional surfaces need views that make the direction visible, not only a front view with an attractive highlight.
Keep material and finish references distinct. A substrate substitution may change the achievable appearance and process. Ask the supplier to identify proposed substitutions and provide the corresponding sample before approval.
Define acceptance and revision handling
Name the reviewer, sample revision and conclusion. If a sample is rejected, record the discrepancy and the requested change. Preserve both the reference and rejected sample identity so the next delivery can be compared meaningfully.
When a finish is approved, update the configuration mapping and all affected visual derivatives. Do not silently rename an old material option while retaining its previous image. Use the CMF review guide and configuration change process.
Download the finish schedule. Its result fields are blank so actual samples and decisions can be recorded. The Rendora option library supports visual material choices and texture references. Keep the physical finish acceptance attached to the specification rather than interpreting browser color as measured production conformity.
Finish questions
Can a hexadecimal color be the entire specification?
It can describe a digital color choice, but the supplier still needs the relevant material, process, physical reference and acceptance method.
Must every visual variation create a new product option?
Create options for actual offered finishes. Camera and lighting differences belong to the observation setup, not the product catalog.
References
- Autodesk, Physical materials and appearances, checked October 26, 2026.
About this guide
Rendora publishes practical guides for teams working with configurable 3D assets and traceable production handoffs. Updated October 26, 2026.