ID 372410 - Custom OCIO config file causes artifacts on texture

Problem summary
When using a specific custom OCIO Config file and painting/baking multiple times on the same position on the geometry, Mari creates artifacts around the edges of the paint. 

Customer reported version
3.4v1

Customer reported platform
n_a_linux

Steps to reproduce

1) Open Mari 

2) Open the New Project window and specify a path to geometry

3) In the New Project window under Colorspace>OCIO Config choose Custom, load the specific OCIO Config file and create the New Project

4) Press F1 to set the lighting to flat.

5) Choose the blue color (0.0, 0.0, 1.0) 

6) Chose the default brush, enlarge the radius and paint/bake

7) Make the brush radius smaller and paint/bake multiple times on the same spot inside of the already painted area 

8) Mari creates artifacts on the edges of the paint 

Workaround
Unknown

Reproduced by support

This bug has been reproduced in:
Mari 4.2v1 - Windows 10 - CentOS 7
Mari 3.4v2 - Windows 10 - CentOS 7 - MacOS 10.12
Mari 3.4v1 - Windows 10

Unable to reproduce bug in:
Mari 3.3v1 - Windows 10 - regression
Mari 3.0v4 - Windows 10

Earliest version tested
3.3v1 - This issue no longer appears in this version and has regressed

Expected behaviour
Mari should not create artifacts on the edges of the paint regardless of the OCIO config file.

Actual behaviour
Mari is affected by the OCIO config file and is creating artifacts on the edges of the paint. 

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