Question about linearRGB color space in sog files

[Enter-tainer]

Hi, thank you for building this cool project! I have few questions about colorspace when using spark in my project. I notice that sog's spec mention that one should always use linear rgb. But when I actually do this, I found that the color looks darker than it should be. My question is, does spark support linear rgb sog files? Or I should use srgb sog files?

[mrxz]

When implementing SOGSv2 support (#179) I initially implemented it to treat these values as linear-space values. However this resulted in washed out colours for every .sog file I tested. A quick look at splat-transform also didn't show any colour space conversions when reading or writing .sog files, leading me to believe that contrary to the spec the .sog files use (non-linear) sRGB colours in practice.

Could you verify that your file also renders with darker colours in other libraries/engines, e.g. using https://superspl.at/editor? If not then the current behaviour in Spark is likely wrong.

[Enter-tainer]

Yes, linear space sog is indeed darker in supersplat.

[Enter-tainer]

Wait, it's even darker in playcanvas's viewer. I'd assume that they made a mistake in their document..