Same texture in 3D and GUI in Linear Colorspace

Hi, I'm trying to switch to using the linear colorspace.

I have a texture (dynamic video) that I need to display on the GUI and also in 3D. The problem is that using Linear colorspace the texture is always displayed diffrently in the GUI.

Does anyone know how I could solve t$$anonymous$$s? I was t$$anonymous$$nking that perhaps I need to use a shader to change the gamma of the texture as it's drawn to the GUI.