texture opacity slider in texture paint mode not working #69172

System Information
Operating system: Windows-10-10.0.17763 64 Bits
Graphics card: GeForce GTX 1070/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 419.67

Blender Version
Broken: version: 2.80 (sub 75), branch: master, commit date: 2019-07-29 14:47, hash: f6cb5f5449
Worked: (optional)

Short description of error
the texture opacity slider when in texture paint mode does not seem to work any more in fact it just does nothing

Added subscriber: @gabbitt

Added subscriber: @xrg

It seems to only work with the Mask Brush texture. If that is deliberate, the overlay slider maybe should be renamed.

Added subscriber: @YAFU

Hi
It is intentional change and it has been renamed to Stencil Opacity in master/buildbot/2.81

Added subscribers: @WilliamReynish, @lichtwerk

Changed status from 'Open' to: 'Archived'

Afaict, this affects the Mask/Stencil layer (and that seems to be working fine).

However, I am not quite following the naming here (seems a bit inconsistent), in code we are using use_stencil_layer, the image is the Stencil Image, the Overlay option is displayed as Stencil Opacity, however you enable the whole thing with Mask... seems a bit off. Why not do the following?
P1085: #69172 snippet



diff --git a/release/scripts/startup/bl_ui/space_view3d_toolbar.py b/release/scripts/startup/bl_ui/space_view3d_toolbar.py
index 9fd35808b4b..0fb0a9e5542 100644
--- a/release/scripts/startup/bl_ui/space_view3d_toolbar.py
+++ b/release/scripts/startup/bl_ui/space_view3d_toolbar.py
@@ -701,7 +701,7 @@ class VIEW3D_PT_slots_projectpaint(View3DPanel, Panel):
 class VIEW3D_PT_stencil_projectpaint(View3DPanel, Panel):
     bl_category = "Tool"
     bl_context = ".imagepaint"  # dot on purpose (access from topbar)
-    bl_label = "Mask"
+    bl_label = "Stencil"
     bl_options = {'DEFAULT_CLOSED'}
 
     @classmethod

That being said, this is not really a bug, (if at all could be a nice improvement for consistency?)
So, will close this as not-a-bug, but maybe there is a reaction from the UI team (could still commit this then...)?
@gabbitt : feel free to comment again if this is a misunderstanding on my side...
CC @WilliamReynish

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texture opacity slider in texture paint mode not working #69172