Start with the surface condition
Decide whether the panel will be front-lit, backlit or used under changing daylight. A sample that looks correct on a desk may reveal haze, hotspots or unwanted depth when placed in front of an LED array. Approve the sample in the same viewing condition as the project.
Define the visual reference
For a solid colour or gradient, give reference colours and a physical sample. For artwork or pattern, provide the original file, expected scale, crop, orientation and seam sequence. Screens are not a colour master for resin because thickness and illumination affect the result.
Specify the physical build
Record nominal thickness, panel size, tolerance for critical dimensions, surface finish, edge finish, machining and any radius or bend. Confirm which measurements are critical and how they will be checked. A drawing should identify the visible face and panel numbering.
Plan support and joints
The installer or engineer should define the substrate, fixing method, support points and movement details. Seam direction affects both appearance and installation. Avoid assuming that a panel can span an opening without appropriate support simply because it is rigid enough to handle.
Review light as a system
For illuminated work, provide the LED type, spacing, output, colour temperature, dimming range, cavity depth and backing colour. Review a mock-up if uniformity, colour or visible hardware are critical. Include access for drivers and maintenance.
Agree documentation and acceptance
State the required datasheet, test report and inspection record for the exact material and thickness. Confirm whether a third-party inspection is required, who attends, which defects are rejectable and what sample or lighting condition defines acceptance.