Hairs & custom normals #87394

New Issue

viktor · 2021-04-11T15:29:26+02:00

viktor commented

2021-04-11 15:29:26 +02:00

System Information
Operating system: Linux 5.10.0-5-amd64 #1 SMP Debian 5.10.26-1
Graphics card: Radeon RX 560 Series

Blender Version
Broken: 2.92 (from snap)
Worked: not known

Short description of error

Hairs does not consider edited ‘custom normals’ and still use ‘face normals’.

Exact steps for others to reproduce the error
Look at attached screenshot.

test_normals.blend

**System Information** Operating system: Linux 5.10.0-5-amd64 #1 SMP Debian 5.10.26-1 Graphics card: Radeon RX 560 Series **Blender Version** Broken: 2.92 (from snap) Worked: not known **Short description of error** Hairs does not consider edited ‘custom normals’ and still use ‘face normals’. **Exact steps for others to reproduce the error** Look at attached screenshot. ![1.jpeg](https://archive.blender.org/developer/F9929373/1.jpeg) [test_normals.blend](https://archive.blender.org/developer/F9929375/test_normals.blend)

viktor commented

2021-04-11 15:29:26 +02:00

Added subscriber: @wayerr

Himanshi Kalra commented

2021-04-11 18:05:06 +02:00

Added subscriber: @Calra

Himanshi Kalra commented

2021-04-11 18:05:06 +02:00

Changed status from 'Needs Triage' to: 'Needs User Info'

Himanshi Kalra commented

2021-04-11 18:05:06 +02:00

Thanks for the report. Could you provide more detailed steps for this?

Look at the screenshot

It is not very helpful here.
More precisely on "what to do with the blend file?" How do I know if custom normals are working on the edited normals object.

Thanks for the report. Could you provide more detailed steps for this? >Look at the screenshot It is not very helpful here. More precisely on "what to do with the blend file?" How do I know if `custom normals` are working on the edited normals object.

viktor commented

2021-04-11 19:59:19 +02:00

Sorry, i does not clearly understand what is need.

In blend file we can select "Edit mode" and will see 'normals' as colored lines (purple lines - is 'custom normals') from vertcles and from center of faces (at bottom on screenshot). I does no known, may be it visible only on my blender, but can be enabled in viewport overlay.
But in any case, edited "custom normals" also affect shadows appearing of object, therefore left object is has different look in viewport with equal mesh. Non edited normals is parallel with 'face normals' (cyan lines from centers of faces).

Sorry, i does not clearly understand what is need. In blend file we can select "Edit mode" and will see 'normals' as colored lines (purple lines - is 'custom normals') from vertcles and from center of faces (at bottom on screenshot). I does no known, may be it visible only on my blender, but can be enabled in viewport overlay. But in any case, edited "custom normals" also affect shadows appearing of object, therefore left object is has different look in viewport with equal mesh. Non edited normals is parallel with 'face normals' (cyan lines from centers of faces).

Himanshi Kalra commented

2021-04-12 06:46:01 +02:00

Changed status from 'Needs User Info' to: 'Needs Triage'

Himanshi Kalra commented

2021-04-12 06:46:01 +02:00

Other moderators might understand it better. Changing status.

Ankit Meel commented

2021-06-17 15:58:02 +02:00

Added subscriber: @ankitm

Ankit Meel commented

2021-06-17 15:58:02 +02:00

How do I know if custom normals are working on the edited normals object.

One of the object has custom split normal layer data. The effect is visible in solid and material viewport shading. Still the hair are exactly the same on both of the objects.
IOW, adding or removing custom split normal data in object data properties doesn't change hair arrangement on an object.

> How do I know if custom normals are working on the edited normals object. One of the object has custom split normal layer data. The effect is visible in solid and material viewport shading. Still the hair are exactly the same on both of the objects. IOW, adding or removing custom split normal data in object data properties doesn't change hair arrangement on an object.

Ankit Meel commented

2021-06-17 16:27:48 +02:00

Changed status from 'Needs Triage' to: 'Needs Developer To Reproduce'

Ankit Meel commented

2021-06-17 16:27:48 +02:00

It gets the normals from either of
normal_short_to_float_v3(nor, mesh_final->mvert[mapindex].no);
normal_short_to_float_v3(n1, mvert[mface->v1].no);
which.. is not using the custom layer.

Don't know if it's oversight or intentional..

It gets the normals from either of `normal_short_to_float_v3(nor, mesh_final->mvert[mapindex].no);` `normal_short_to_float_v3(n1, mvert[mface->v1].no);` which.. is not using the custom layer. Don't know if it's oversight or intentional..

Philipp Oeser removed the

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Hairs & custom normals #87394