Nuclear Light - The Color Solutions

FireGrade FAQ





What color modes are supported by FireGrade?

Lab and RGB. But we recommend Lab because in this mode you can get more predictable results in some cases.


Which Adobe Photoshop versions are supported?

FireGrade currently supports only x64 versions. 32-bit versions are not supported.

Versions for Windows: CC and higher.

Versions for macOS: CC and higher.


What Windows versions are supported?

Windows 10 x64 build 2004 and higher.


What macOS versions are supported?

macOS 10.13 ~ 11.2 (Intel only)


What screen resolution is recommended?

1920x1080 or higher.


What maximum image size is supported by FireGrade?

No limit.


Does FireGrade support Photoshop actions and scripting?



Does FireGrade contain its own presets?



What bit depth per channel image is supported?

8 and 16 bits per channel.


Does FireGrade support preview modes like Proof Colors and Gamut Warning?

Yes in Lab color mode. You can view results of correction in the plugin preview window with target color space and profile.


Does FireGrade support layers?



Does FireGrade support layer opacity and layer mask opacity in its preview window?



Does FireGrade support multi-core CPU's and multiprocessor systems?



What is Lch color space?

This is a cylindrical representation of Lab color space.

Read more about Lab and Lch in Wikipedia article.


Colors in my images changed after conversion from Lab color space to RGB or CMYK. Why?

Because Lab color space has larger gamut than RGB or CMYK.

Read more about gamuts in Wikipedia article.


Lab numbers are sometimes slightly different from Photoshop eyedropper and FireGrade eyedropper. Why?

Because of rounding in conversion routines from integral to floating point numbers and vice versa.


Histograms in FireGrade look a little different than Photoshop histograms. Why?

Because we use our own representation for histograms that is slightly more informative.


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