Degraded texture shading on dense meshes #61024

New Issue

Tsvetelin Lyubenov · 2019-01-30T15:57:55+01:00

2019-01-30 15:57:55 +01:00

System Information
Operating system: Windows 10 Enterprise, 64bit
Graphics card: Nvidia GeForce GTX 970

Blender Version
Broken: 2.80 beta, hash: a1ae04d15a, date:2019-01-29 22:41
Worked: 2.79b (official), hash: f4dc9f9d68, date:2018-03-22 14:10

Short description of error
Texture shading degrades (not smooth) on high dense meshes. Used a wave texture in the example, but the problem is present also using high resolution image textures (I used zebra reflection map). Present in Eevee LookDev and Rendered, and also in Solid mode using high resolution matcap.
{F6454243}

Exact steps for others to reproduce the error
Use this file (from the screenshots) and open it with 2.79b and 2.8beta to compare : HighResMesh.blend or..
In an empty file add a monkey, turn on smooth shading, subdivide it smooth 6-10 times or use Subdivision modifier(6 subdivisions are enough). Add a reflection mapped wave texture and thats it.
In 2.79b the more subdivisions are added the more smooth appears the texture. Used Material display mode so the texture gets visible in the viewport.
In 2.8 beta there is noticeable distortion of the smoothness even with very high subdivision levels.
It's more noticeable with reflection and normal mapping, but present in other mapping modes also.
The problem is not present in Cycles. Only with matcaps and Eevee display modes.

**System Information** Operating system: Windows 10 Enterprise, 64bit Graphics card: Nvidia GeForce GTX 970 **Blender Version** Broken: 2.80 beta, hash: a1ae04d15a9f, date:2019-01-29 22:41 Worked: 2.79b (official), hash: f4dc9f9d68b, date:2018-03-22 14:10 **Short description of error** Texture shading degrades (not smooth) on high dense meshes. Used a wave texture in the example, but the problem is present also using high resolution image textures (I used zebra reflection map). Present in Eevee LookDev and Rendered, and also in Solid mode using high resolution matcap. {[F6454243](https://archive.blender.org/developer/F6454243/zebraHighDenseMesh2.80beta.png)}![zebraHighDenseMesh2.79b.png](https://archive.blender.org/developer/F6454246/zebraHighDenseMesh2.79b.png) **Exact steps for others to reproduce the error** Use this file (from the screenshots) and open it with 2.79b and 2.8beta to compare : [HighResMesh.blend](https://archive.blender.org/developer/F6454326/HighResMesh.blend) or.. In an empty file add a monkey, turn on smooth shading, subdivide it smooth 6-10 times or use Subdivision modifier(6 subdivisions are enough). Add a reflection mapped wave texture and thats it. In 2.79b the more subdivisions are added the more smooth appears the texture. Used Material display mode so the texture gets visible in the viewport. In 2.8 beta there is noticeable distortion of the smoothness even with very high subdivision levels. It's more noticeable with reflection and normal mapping, but present in other mapping modes also. The problem is not present in Cycles. Only with matcaps and Eevee display modes.

Tsvetelin Lyubenov commented

2019-01-30 15:57:55 +01:00

Added subscriber: @rendetto

Clément Foucault was assigned by Jacques Lucke

2019-01-30 16:50:51 +01:00

Clément Foucault commented

2019-01-30 19:12:36 +01:00

Added subscriber: @brecht

Clément Foucault commented

2019-01-30 19:12:36 +01:00

I think this is because we use encoded 10bits normal vectors for performance and VRAM usage.

Maybe we need to add a highquality normal/tangent option somewhere.

@brecht any thoughts?

I think this is because we use encoded 10bits normal vectors for performance and VRAM usage. Maybe we need to add a highquality normal/tangent option somewhere. @brecht any thoughts?

Brecht Van Lommel commented

2019-01-31 17:43:05 +01:00

If it's indeed the 10bit normals, I guess there is not much that can be done besides adding an option for higher quality normals (16bit?).

I wouldn't know how to avoid such artifacts otherwise.

If it's indeed the 10bit normals, I guess there is not much that can be done besides adding an option for higher quality normals (16bit?). I wouldn't know how to avoid such artifacts otherwise.

Clément Foucault was unassigned by Dalai Felinto

2019-12-23 16:35:16 +01:00

Dalai Felinto commented

2019-12-23 16:35:16 +01:00

Added subscriber: @fclem

blender-admin commented

2020-02-19 01:44:52 +01:00

This issue was referenced by e82827bf6e

This issue was referenced by e82827bf6ed54a1d1552ac9176df9e309b4d29e2

Clément Foucault commented

2020-02-19 01:59:09 +01:00

Changed status from 'Confirmed' to: 'Resolved'

Clément Foucault closed this issue

2020-02-19 01:59:09 +01:00

Clément Foucault self-assigned this 2020-02-19 01:59:09 +01:00

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Degraded texture shading on dense meshes #61024