Loading btx file in multires modifier is not working since 2.80 #74686

New Issue

Christophe Schollhammer · 2020-03-12T15:14:33+01:00

2020-03-12 15:14:33 +01:00

Blender Version
Broken: 2.80-2.81-2.82-2.83
Worked: 2.79b

Short description of error
When I try to load a btx file in multires modifier the mesh get exploded.

The console gives :

ERROR (bke.customdata): K:\BlenderGit\blender\source\blender\blenkernel\intern\customdata.c:662 layerRead_mdisps: failed to read multires displacement 0/24 0

Exact steps for others to reproduce the error

Open blender
Select Cube
Add multires modifier
Subdivide 3 times
Duplicate the Cube
For each Cube, in multires modifier click on save external to save a btx file
You will save two files - Cube.btx and Cube.001.btx
With Cube.001 selected, in multires modifier, change the filepath input to load the Cube.btx
The mesh is exploded.
The same happens if you upload another btx file to the other Cube

Cube.001.btx
Cube.004.btx
Cube.005.btx
279_ok_Cube.btx
Cubeno.btx
Cube.btx

**Blender Version** Broken: 2.80-2.81-2.82-2.83 Worked: 2.79b **Short description of error** When I try to load a btx file in multires modifier the mesh get exploded. ![2020-03-12_05691.jpg](https://archive.blender.org/developer/F8402305/2020-03-12_05691.jpg) The console gives : ``` ERROR (bke.customdata): K:\BlenderGit\blender\source\blender\blenkernel\intern\customdata.c:662 layerRead_mdisps: failed to read multires displacement 0/24 0 ``` **Exact steps for others to reproduce the error** - Open blender - Select Cube - Add multires modifier - Subdivide 3 times - Duplicate the Cube - For each Cube, in multires modifier click on save external to save a btx file You will save two files - `Cube.btx` and `Cube.001.btx` - With `Cube.001` selected, in multires modifier, change the filepath input to load the `Cube.btx` The mesh is exploded. The same happens if you upload another btx file to the other Cube [Cube.001.btx](https://archive.blender.org/developer/F8402297/Cube.001.btx) [Cube.004.btx](https://archive.blender.org/developer/F8402298/Cube.004.btx) [Cube.005.btx](https://archive.blender.org/developer/F8402299/Cube.005.btx) [279_ok_Cube.btx](https://archive.blender.org/developer/F8402300/279_ok_Cube.btx) [Cubeno.btx](https://archive.blender.org/developer/F8402301/Cubeno.btx) [Cube.btx](https://archive.blender.org/developer/F8402302/Cube.btx)

Christophe Schollhammer commented

2020-03-12 15:14:33 +01:00

Added subscriber: @cscholl

Richard Antalik commented

2020-03-13 12:05:41 +01:00

Added subscribers: @fclem, @iss

Richard Antalik commented

2020-03-13 12:05:41 +01:00

I don't really know if this is intended use. @fclem do you know?

Germano Cavalcante commented

2020-03-13 12:40:33 +01:00

Added subscribers: @Sergey, @mano-wii

Germano Cavalcante commented

2020-03-13 12:40:34 +01:00

In #74686#890483, @iss wrote:
I don't really know if this is intended use. @fclem do you know?

This seems to be more a problem in the multires modifier than drawing.
I may be wrong, but I think it was @Sergey who worked on it.

> In #74686#890483, @iss wrote: > I don't really know if this is intended use. @fclem do you know? This seems to be more a problem in the multires modifier than drawing. I may be wrong, but I think it was @Sergey who worked on it.

Germano Cavalcante commented

2020-03-13 12:41:22 +01:00

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