You can use both color profiles in RC (sRGB or linear). There is also opportunity to tone mapping, when you are importing 16 bit HDR images (Tone-mapping method Choose a codec for tone mapping of inputs for further processing: either (a special) Local windows codec (you have installed on your machine) by selecting No tone mapping, which will only convert 16-bit/HDR inputs to 8-bit without any color, contrast, gamma adjustement or you can choose RC tone mapping (recommended, optimized for use in RealityCapture)).