Eevee Image Texture Box mapping inconsistent with Cycles if object is scaled #62178

New Issue

Ludvik Koutny · 2019-03-04T11:37:20+01:00

Ludvik Koutny commented

2019-03-04 11:37:20 +01:00

System Information
Operating system: Windows 10
Graphics card: GTX1080Ti

Blender Version
Broken: 2.8 latest master
Worked: Probably never

Short description of error
Eevee Image Texture Box mapping is inconsistent with Cycles output if object is scaled. The fact that it works but unreliably is even more dangerous than if it did not work at all.
Left is Eevee and right is Cycles:

Exact steps for others to reproduce the error
1, Open the attached blend file:MountainMappingBug.zip
2, Switch right viewport to Rendered mode
3, Notice the difference in the result despite Eevee having support for Box mapping

Result: Eevee box mapping result is different if the object is scaled

Expected: Eevee box mapping result is identical to Cycles in all cases, even if the object is scaled.

**System Information** Operating system: Windows 10 Graphics card: GTX1080Ti **Blender Version** Broken: 2.8 latest master Worked: Probably never **Short description of error** Eevee Image Texture Box mapping is inconsistent with Cycles output if object is scaled. The fact that it works but unreliably is even more dangerous than if it did not work at all. Left is Eevee and right is Cycles: ![image.png](https://archive.blender.org/developer/F6758894/image.png) **Exact steps for others to reproduce the error** 1, Open the attached blend file:[MountainMappingBug.zip](https://archive.blender.org/developer/F6758906/MountainMappingBug.zip) 2, Switch right viewport to Rendered mode 3, Notice the difference in the result despite Eevee having support for Box mapping Result: Eevee box mapping result is different if the object is scaled Expected: Eevee box mapping result is identical to Cycles in all cases, even if the object is scaled.

Ludvik Koutny commented

2019-03-04 11:37:20 +01:00

Added subscriber: @Rawalanche

Clément Foucault was assigned by Sebastian Parborg

2019-03-04 12:40:16 +01:00

Ulysse Martin commented

2019-03-25 07:28:46 +01:00

Added subscriber: @you.le

Ulysse Martin commented

2019-03-25 07:28:46 +01:00

I'm not sure, but it seems there is something in cycles code which seems not in eevee's code:

When we apply this, it seems both have the same behaviour:

p.diff

Maybe the codes to compare are in D:\Compilation\Blender\BFBlenderSources\intern\cycles\render\nodes.cpp for Cycles and
D:\Compilation\Blender\BFBlenderSources\source\blender\nodes\shader\nodes\node_shader_tex_image.c for EEVEE

I'm not sure, but it seems there is something in cycles code which seems not in eevee's code: When we apply this, it seems both have the same behaviour: [p.diff](https://archive.blender.org/developer/F6879529/p.diff) Maybe the codes to compare are in D:\Compilation\Blender\BFBlenderSources\intern\cycles\render\nodes.cpp for Cycles and D:\Compilation\Blender\BFBlenderSources\source\blender\nodes\shader\nodes\node_shader_tex_image.c for EEVEE

Clément Foucault commented

2019-03-27 22:05:54 +01:00

I think the issue is caused by the Orco optimization I did for Eevee. Investigating...

blender-admin commented

2019-03-28 22:08:39 +01:00

This issue was referenced by 42dd888b98

This issue was referenced by 42dd888b98b598c240f78302b857fa60add08ca5

Clément Foucault commented

2019-03-28 22:09:40 +01:00

Changed status from 'Open' to: 'Resolved'

Clément Foucault closed this issue

2019-03-28 22:09:40 +01:00

Sign in to join this conversation.

No Label

Download

What's New

Blender Studio

Manual

Developers Blog

Documentation

Benchmark

Blender Conference

Development Fund

One-time Donations

Eevee Image Texture Box mapping inconsistent with Cycles if object is scaled #62178