Subdivision Creasing Unresponsive on 0.55-0.99 range #68200

System Information
Operating system: Windows-10-10.0.17134 64 Bits
Graphics card: GeForce GTX 770/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 431.36

Blender Version
Broken: version: 2.81 (sub 1), branch: master, commit date: 2019-08-03 10:22, hash: 5e5cf9ea9f
(Also broken in 2.8 release version)
Worked: 2.79b

Short description of error
When using Edge Creasing and Subdivision Surface modifier the result is inconsistent for .55-.99 values. For 0-.55 the mesh updates gradually as one would expect. However, after that inserting .6 .7 .8 .9 no visual change can be observed. At value of 1 the mesh snaps to the final creasing. (which is considerably sharper than the .55)

Exact steps for others to reproduce the error

Select the default cube.
Add a subdivision surface modifier
Go to edit mode and select single edge (or all edges)
Press N to open tab and go to edge data to scrub Crease value
Observe how 0-.55 change is linear but after that nothing really happens before 1.0

EdgeCreasingProblems.blend

Added subscriber: @T.R.O.Nunes

#100188 was marked as duplicate of this issue

Added subscriber: @Sergey

Changed status from 'Open' to: 'Archived'

This is as best as the surface can be estimated at quality 3. Going higher in Quality setting of the modifier will allow to have more accurate crease calculation.

Thanks for the report, but it's not a bug, but rather how new subdivision surface algorithm works.

Added subscribers: @MassimilianoPuliero, @Memm

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Subdivision Creasing Unresponsive on 0.55-0.99 range #68200