Texture Looks Correct in Viewport but Washed Out in Render
A prop artist assigns a 4K albedo map to an aiStandardSurface base color and a matching roughness map. In the viewport with the default lighting the prop looks correct. In the Arnold render the albedo appears washed out and the roughness variation is nearly invisible. The maps were exported from a package that stores color data in sRGB. The render uses a single area light and an HDRI. Exposure is default. The artist suspects the maps are wrong.
1. Identify the most likely cause and the correction.
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The albedo map is almost certainly being read as linear when it contains sRGB-encoded data, or vice versa. If an sRGB albedo is treated as linear, midtones lift and the image looks washed out. Roughness maps are data maps and must be linear; if a roughness map is tagged sRGB, its values are remapped and the variation compresses, which matches the symptom.
Correction:
- On the albedo file node, set Color Space to sRGB (Maya's default for 8-bit color textures).
- On the roughness file node, set Color Space to Raw or Linear, and disable any gamma correction.
- Re-render a test frame and compare midtone values against the source map in an image viewer that respects color management.
Also confirm the render view transform is not adding a look that flattens contrast; check the Color Management preferences.
2. How would you verify the diagnosis before re-exporting any maps?
Read the worked answer
Isolate variables rather than re-exporting blindly:
- Assign a flat 0.5 gray to base color and render. If the surface still looks washed out, the problem is lighting or color management, not the albedo.
- Plug the roughness map into a remap or view it directly in the Hypershade to read its numeric range. A roughness map that should span 0.2-0.8 but reads 0.5-0.6 suggests a color-space remap.
- Temporarily set the roughness file node to Raw and re-render. If variation returns, the color space was the cause.
- Compare the render against the HDRI alone with the area light disabled, to rule out double-lighting flattening the result.
Only after these tests should you touch the source maps.