Values

Linear

Output color as they came in. This can cause bright lighting to look blown out, with noticeable clipping in the output colors.

Reinhard

Use the Reinhard tonemapper. Performs a variation on rendered pixels' colors by this formula: color = color / (1 + color). This avoids clipping bright highlights, but the resulting image can look a bit dull.

Filmic

Use the filmic tonemapper. This avoids clipping bright highlights, with a resulting image that usually looks more vivid than godot.VisualServer_EnvironmentToneMapper.reinhard.

Aces

Use the legacy Godot version of the Academy Color Encoding System tonemapper. Unlike godot.VisualServer_EnvironmentToneMapper.acesFitted, this version of ACES does not handle bright lighting in a physically accurate way. ACES typically has a more contrasted output compared to godot.VisualServer_EnvironmentToneMapper.reinhard and godot.VisualServer_EnvironmentToneMapper.filmic.

Note: This tonemapping operator will be removed in Godot 4.0 in favor of the more accurate godot.VisualServer_EnvironmentToneMapper.acesFitted.

AcesFitted

Use the Academy Color Encoding System tonemapper. ACES is slightly more expensive than other options, but it handles bright lighting in a more realistic fashion by desaturating it as it becomes brighter. ACES typically has a more contrasted output compared to godot.VisualServer_EnvironmentToneMapper.reinhard and godot.VisualServer_EnvironmentToneMapper.filmic.