Previewing the glossy texture requires precise adjustments (it must be equivalent to the factor defined for baking).
For my test, all my baking factors were at 0.5 "limit -> [0-1]".
for emission and metal (1/ bake value):
bake -> 0.75 | 0.5 | 0.25
preview -> 1.33 | 2.0 | 4.0
As for roughness, that's its difference on 1:
bake -> 0.75 | 0.5 | 0.25
preview -> 0.25 | 0.5 | 0.75
For my test, all my baking factors were at 0.5 "limit -> [0-1]".
for emission and metal (1/ bake value):
bake -> 0.75 | 0.5 | 0.25
preview -> 1.33 | 2.0 | 4.0
As for roughness, that's its difference on 1:
bake -> 0.75 | 0.5 | 0.25
preview -> 0.25 | 0.5 | 0.75

