P: No red preview when changing brush size

I have also just posted the same problem as well. Appeared out of the blue.

Suddenly out of the blue my HUD brush size/hardness adjustment has no colour fill. It shows nothing but a thin black circular outline. I am using the standard general brush set. When I hold down the Option & Control keys (Mac) I get a simple circular brush outline. It changes size with sideways cursor movement but with only an outline I cannot see hardness. The little read out box beside the circle shows that hardness is changing with vertical movement and the resulting brush is changed as it should be but it is not visible in HUD mode without a colour fill. My brush cursor is set in preferences to Normal. The HUD fill is set in preferences to the default red.
The problem occurs with both mouse and Wacom. It occurs in all all Image modes and in 8 and 16 bit. It is persistent through both Photoshop re-start and system re-start.

It has worked perfectly in this current version of photoshop until today. I have not changed any settings in preferences prior to this occurring.  I have searched through all the relevant settings and I can see nothing amiss.  I not aware of anything else having been changed that might trigger this.

I have not yet tried a full re-install until I am sure there is no other option.

iMac (Retina 5K, 27-inch, 2019)

3,7 GHz Intel Core i5

32 GB 2667 MHz DDR4

Radeon Pro 580X 8 GB

Same Problem here!!

The same here!!!

My PSD Do not show color picker on the pointer (whit the command cmd+alt+ctrl and click)) and the size and the transparency (red dot) 

It's impossible to draw and colorize illustrations with this issue...

Please, I don't finish my work with this issues!!! what's happened!!!

I change the preferences render target graphics and do not solve the issue

Please solve this! 

THANKS IN ADVANCE

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Catalina 10.15.7

Mac Book Pro 16'' i9

Photoshop 22.0.1

Same problem here on mac Catalina or Big Sure.
Red visual representation has disappeared.

Resizing brush red Visual representation with ALT key has been disappeared after the very last update.

usually, this feature is activated by activating the Graphics processing setting in the performance preferences.

Although it has been activated and the graphics drivers updated, it is still hidden. 

notice that some other features in photoshop depend on graphics processing OpenGL still works fine like the rotate view tool.

I was working fine before the last photoshop update.

Windows 10 Enterprise 64Bit version 20H2 OS Build 19042.630

OpenGL Version: 4.6.0 - Build 27.20.100.8281

Graphics Card Intel HD Graphics 520 version. 27.20.100.8281

AMD Graphics card Radeon Adrenalin 2020 edition 20.11.1 

Photoshop 2021 Release 22.0.1

Thank you so much Jeffrey and Adobe team too; I appreciate your fast answer 🙂

Engineering is investigating this issue.

VARY ROUD BRUSH HARDNESS BASED ON HUD VERTICAL MOVEMENT works but without the red visual cue on 22.0.1 and Big Sur.

Here's a screen grab...

Open your Adobe CC app, click on the ellipses next to the Open button for Photoshop. Click the Other versions, and Install for the Photoshop (22.0) version. The app will take care of the rest.