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Hair Info -> Tangent Normal still not working properly in Eevee
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Description

Blender Version
Broken: 9c5d54bfaf48
Worked: d966c2f0c2ad

Short description of error
Hair Info Normal Tangents are still not working as they were in builds from April and before.
I filed a bug report (T65042) in May and it was marked as solved, using the latest build though shows the hair shading is even wonkier than before:

9c5d54bfaf48 (Latest build, broken):

85322737baec (Broken):

d966c2f0c2ad (Working):

I would really appreciate a thorough look into this, it appears the problem has persisted for almost 2 months now.

Exact steps for others to reproduce the error
Based on the default startup or an attached .blend file (as simple as possible).

Details

Type
Bug

Event Timeline

Tom Wilson (hedgehog90) updated the task description. (Show Details)
Tom Wilson (hedgehog90) renamed this task from Hair Info -> Tangent Normal //still// not working properly. to Hair Info -> Tangent Normal still not working properly..
Tom Wilson (hedgehog90) renamed this task from Hair Info -> Tangent Normal still not working properly. to Hair Info -> Tangent Normal still not working properly in Eevee.Jun 24 2019, 8:32 PM
Sebastian Parborg (zeddb) triaged this task as Needs Information from User priority.

Can you attach an example file?

Same one as before.

Sebastian Parborg (zeddb) raised the priority of this task from Needs Information from User to Confirmed, Medium.

You are trying to compare with a broken version.

Only the first one you show is correct. What you label as broken is the intended behavior. Always compare to cycles for reference not previous version of eevee.

Cycles


Eevee

Any idea how I can achieve the hair normals from d966c2f0c2ad in the latest version?