P: Healing brush & clone stamp tools lagging

i'm having a similar problem as well, except in my case it manifests as empty black squares. performing a zoom seems to clear it, so just like your case it's not destructive, rather something in how photoshop is rendering the live image

I've also started getting weird rectangular patterns showing up on the screen while using the brush. Sometimes thin like in this example image. Sometimes really large. If you continue to brush over the image it slowly goes away. Or, if you change the opacity of the layer, the whole thing goes away immediately. But, it's happening often. It seems to me that CC 2019 is quite unstable, yet at least usable without the rulers.  

Try to adjust graphic performance preferences to Normal. It's under Settings / Performance / GPU settings / Advanced. Also disable Anti-aliasing for paths and curves. Photoshop needs to be restarted afterwards to take effects.

Hey guys, after updating to PS CC2019 I'm having a ton of issues with the brush tool, I've cross posted this from twitter and other adobe forums in the interest of clearer bug reporting and visibility.





iMac (Retina 5K, 27-inch, Late 2014)
macOS Mojave 10.14
4 GHz Intel Core i7
32 GB 1600 MHz DDR3
AMD Radeon R9 M295X 4096 MB
Wacom Cintiq 27QHD

These all seem to be linked to Mojave specifically and only occur when rulers are visible. If they are hidden they do not occur. I have attempted a number of regular performance fixes that adobe customer support suggested on twitter as well as different forums, this includes things like purging preferences, re-installation, turning off GPU use and turning on legacy compositing. From what I've gathered from other users, with most people experiencing this issue the common links are, PS CC2019, Mojave, Ruler visibility and a Wacom product.

The reproducible bugs are:

1: If I hold a brushstroke for any more than a second or two (with rulers visible) I get a busy cursor (a ring of rotating dots) this happens no matter if Im using my mouse or the wacom. It no longer allows me to see the brush tip shape but will continue to make the brush stroke just fine. This happens no matter how small the document or how simple the brush.

2: After I make multiple consecutive brush strokes photoshop cant seem to quite keep up, if I make 5 brush strokes in rapid succession the first one may appear in real time but they rapidly begin to fall behind where my cursor actually is. This does not happen in cc2018 where i'm using the exact same brush on the same document size. These are simple round brushes on small documents, I'm really not pushing it. (This may have improved with a preference reset its hard to tell)


3: It seems to occasionally (every 10th input or so) skip a brushstroke, making only a single low opacity circle or no mark at all without drawing the rest of the line. I can scrub the cursor across the document at full pressure and it makes no mark till I lift the pen off the tablet to make a new mark.


To clarify these issues only seem to occur when rulers are visible, all though I will still very rarely get a busy cursor when painting with them hidden all though that seems unrelated.

Heres a video showing at least the busy cursor bug: https://youtu.be/cSet4UQiitw
The other bugs are too inconsistent to easily show but seem related to the issue since they all occur under the same conditions.

I've had to reinstall 2018... 2019 is unusable due to this bug 😕😕 

Both the ruler fix and preserve details fix does not work for me

UPDATE: Hiding the rulers eliminated my brush lag. That is a bummer that hiding the ruler doesn't solve everyone's brush lag issues. Here's to a quick fix from Adobe, Cheers!

Hiding the ruler eliminated my brush lag. Cheers!

I emailed you my system info just now. For anyone else reading this thread, HIDING RULER eliminated the brush lag on my end. 

"paint tool" above should be "brush tool" obviously, my bad