https://bugs.kde.org/show_bug.cgi?id=437132

--- Comment #3 from Ahab Greybeard <[email protected]> ---
Created attachment 138552
  --> https://bugs.kde.org/attachment.cgi?id=138552&action=edit
Softproofing problem

I can confirm this for the May 18 5.0.0-prealpha (git f4b9dc43be) portable .zip
on Windows 10.

A screenshot is attached for Greyscale/Alpha softproofing. The softproofed
canvas can be totally transparent and sometimes as shown in the attached
screenshot.
Similar behaviour happens with CMYK/A softproofing.

If painting is done on the softproofed canvas, smaller and more complex
artifacts appear.

However, the fault is intermittent and sometimes dos not happen at all if you
create a new image.

Using the May 06 5.0.0-prealpha (git 0967b8a37e) portable .zip on Windows 10,
the major softproofing flaws of the May 18 do not happen but there are
sometimes smaller transparent areas and also minor artifacts when painting on a
softproofed canvas.

None of this is seen with 4.4.3 installed on Windows 10.

SOFTWARE/OS
Krita

 Version: 5.0.0-prealpha (git f4b9dc4)
 Languages: en_US, en
 Hidpi: false

Qt

  Version (compiled): 5.12.9
  Version (loaded): 5.12.9

OS Information

  Build ABI: x86_64-little_endian-llp64
  Build CPU: x86_64
  CPU: x86_64
  Kernel Type: winnt
  Kernel Version: 10.0.19042
  Pretty Productname: Windows 10 (10.0)
  Product Type: windows
  Product Version: 10

OpenGL Info

  Vendor:  "Google Inc." 
  Renderer:  "ANGLE (NVIDIA GeForce GTX 750 Ti Direct3D11 vs_5_0 ps_5_0)" 
  Version:  "OpenGL ES 3.0 (ANGLE 2.1.0.57ea533f79a7)" 
  Shading language:  "OpenGL ES GLSL ES 3.00 (ANGLE 2.1.0.57ea533f79a7)" 
  Requested format:  QSurfaceFormat(version 3.0, options
QFlags<QSurfaceFormat::FormatOption>(DeprecatedFunctions), depthBufferSize 24,
redBufferSize 8, greenBufferSize 8, blueBufferSize 8, alphaBufferSize 8,
stencilBufferSize 8, samples -1, swapBehavior QSurfaceFormat::DoubleBuffer,
swapInterval 0, colorSpace QSurfaceFormat::DefaultColorSpace, profile 
QSurfaceFormat::CompatibilityProfile) 
  Current format:    QSurfaceFormat(version 3.0, options
QFlags<QSurfaceFormat::FormatOption>(), depthBufferSize 24, redBufferSize 8,
greenBufferSize 8, blueBufferSize 8, alphaBufferSize 8, stencilBufferSize 8,
samples 0, swapBehavior QSurfaceFormat::DefaultSwapBehavior, swapInterval 0,
colorSpace QSurfaceFormat::DefaultColorSpace, profile 
QSurfaceFormat::NoProfile) 
     Version: 3.0
     Supports deprecated functions false 
     is OpenGL ES: true 

QPA OpenGL Detection Info 
  supportsDesktopGL: true 
  supportsAngleD3D11: true 
  isQtPreferAngle: true

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