How to export a file with the format R8G8B8A8_UNORM_SRGB

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Hi,

I would like to know which export option (photoshop) should I choose so that the file is compatible with the format: R8G8B8A8_UNORM_SRGB ?

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Update: The answer below is outdated. Texture Tools Exporter 2024.1.1 now allows you to force _SRGB or non-_SRGB formats! You can find the setting for this at the bottom of the settings pane, under “Export Transfer Function”. For more information, please see post 4 below, or Color conversion exceptions using nvtt export - #5 by nbickford !

Hi @F4ll0ut! I believe the closest you can currently get is by selecting 8.8.8.8 BGRA:

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and by enabling “DDS:Use DXT10 Header” at the bottom here:

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This will output an uncompressed DDS file using the B8G8R8A8_UNORM DXGI format - roughly similar to R8G8B8A8_UNORM_SRGB, but the channels are in a different order, and the GPU does not automatically convert colors to linear.

(Without “Use DXT10 Header”, it’ll output an uncompressed DDS file that uses bitmasks; this should be compatible with apps that use DDS readers from before DirectX 10 was released.)

Is there a specific app you’re trying to use this file with, if I can ask?

Thanks!

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Thanks for your answer. It’s for a texture for the game Starfield that just came out.

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Hi @F4ll0ut! Sorry to revive this old thread, but we had a quick update on this.

We released NVIDIA Texture Tools Exporter 2024.1.1 today, which adds support for writing uncompressed textures in RGBA8 format (previously, we supported BGRA8 but not RGBA8)!

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If you check “DDS: Use DXT10 Header” and set “Export Transfer Function” to “Override: sRGB” at the bottom of the settings pane, the DDS file will use the DXT10 header with the DXGI_FORMAT_R8G8B8A8_UNORM_SRGBformat:

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Hope this helps!