Cycles displacement ignores UV offset of instances using Object Info Random output #93990

New Issue

Rowan Ibbeken · 2021-12-12T12:38:56+01:00

Rowan Ibbeken commented

2021-12-12 12:38:56 +01:00

System Information
Operating system: Windows 10 64-bit
Graphics card: Nvidia RTX 3090

Blender Version
Broken: All versions tested (2.93 & 3.0)
Worked: All versions tested (2.93 & 3.0)

Short description of error

When offsetting UVs for each instance of an object, like the sphere in the .blend file, I'm using the 'Random' output of the 'Object Info' node. This works as expected when randomising the bump for each instance, but when I switch to true displacement Blender ignores the UV offset and uses the same UV mapping for each instance.

Exact steps for others to reproduce the error

Open .blend file.
Go to rendered view; UV mapping of bump will be randomised as expected.
Switch from 'Bump' to 'Displacement Only' in material settings.
Go to rendered view; UV mapping of displacement will be the same for every instance, ignoring the UV offset in 'Test Material'.

Displacement UV Bug.blend

**System Information** Operating system: Windows 10 64-bit Graphics card: Nvidia RTX 3090 **Blender Version** Broken: All versions tested (2.93 & 3.0) Worked: All versions tested (2.93 & 3.0) **Short description of error** When offsetting UVs for each instance of an object, like the sphere in the .blend file, I'm using the 'Random' output of the 'Object Info' node. This works as expected when randomising the bump for each instance, but when I switch to true displacement Blender ignores the UV offset and uses the same UV mapping for each instance. **Exact steps for others to reproduce the error** - Open .blend file. - Go to rendered view; UV mapping of bump will be randomised as expected. - Switch from 'Bump' to 'Displacement Only' in material settings. - Go to rendered view; UV mapping of displacement will be the same for every instance, ignoring the UV offset in 'Test Material'. [Displacement UV Bug.blend](https://archive.blender.org/developer/F12733695/Displacement_UV_Bug.blend)

Rowan Ibbeken commented

2021-12-12 12:38:56 +01:00

Added subscriber: @Rowan-Ibbeken

Rowan Ibbeken changed title from ~~Cycles displacement ignores UV offset using Object Info Random output~~ to Cycles displacement ignores UV offset of instances using Object Info Random output

2021-12-12 12:40:00 +01:00

Germano Cavalcante commented

2021-12-15 19:51:32 +01:00

Added subscriber: @mano-wii

Germano Cavalcante commented

2021-12-15 19:51:32 +01:00

Changed status from 'Needs Triage' to: 'Confirmed'

Germano Cavalcante commented

2021-12-15 19:51:32 +01:00

Thanks for the report, but this is the same issue reported in #86779 (Displacement not using correct information for instanced object that uses Object Info Random).
(The steps to replicate are simpler here however).

Thanks for the report, but this is the same issue reported in #86779 (Displacement not using correct information for instanced object that uses Object Info Random). (The steps to replicate are simpler here however).

Germano Cavalcante commented

2021-12-15 19:51:58 +01:00

Closed as duplicate of #86779

Germano Cavalcante closed this issue

2021-12-15 19:51:58 +01:00

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Cycles displacement ignores UV offset of instances using Object Info Random output #93990