ok it seems like sharpness also contributes to this bug. what was your sharpness setting ? if you set sharpness strength to 0 and saturation to 1.0 then there should be no holes at all.
You can also post process added sharpness onto your video in some compositing app (after effects/shake/whatever). Marmoset renders looks so sharp thanks to it's sharpness post-process.
Setting the gloss map to white and turning the sharpness all the way up with the Specular Sharpness slider will give you the max sharpness for the IBL specular reflection. You can manually type in values higher than 256, however, I think that will only effect the sharpness of dynamic lights. This is something that we will…
metalliandy's sharp from uv isles doesn't seems to work with latest blender.What are you blender people using to harden edges to uv islands for nmaps ?