Make colors HDR compatible

[drizztdourden08]

Hi,

This is a really simple one. Can you make color variables HDR? This would still achieve the same as now with the added possibility of over-saturating the the color for effects pupose.

This is a really nice and easy way of achieving glow effects with bloom. Crank up the color HDR variable and then, set the bloom post-processing threshold over 1. The rest of the elements aren't affected but the one you're interested in, in this case, ui elements for which their colors is set higher than 1.

I assume this should not be that hard to achieve, although I might be wrong. I do it all the times in Shader Graph with this setting:

I'm not sure if it would keep the compatibility with older version, although set to one, it is the same thing. Maybe a toggle to use HDR on the root UIBlock?