Photoshop: Brushing with Wacom tablet shows blocks around brush strokes. (MacBook Air Graphics)

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  • Updated 2 months ago
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I'm using a Cintiq 13HD on an early 2015 MacBook Air with 8GB RAM and a 1.6 GB i5 processor, and an Intel HD 6000 1536 MB graphics card. This is not an ideal setup for Photoshop (v20.0.4), so I'm really just looking for ideas on how to resolve or minimize a graphics issue rather than suggesting it's an out and out bug. What I'm seeing as I'm brushing on the Cintiq is large areas of the image suddenly "block out", either going corrupt (wild coloured zig-zag lines) or simply blanking out on that layer. It's not the whole layer, but just a very large square or rectangle of it. If I cycle the view of the layer off then on again, the issue goes away. However, I'm having to do this very frequently (often several times a minute) when I'm using the brush tool. This doesn't happen that often (but still does) on my iMac with loads of RAM, etc. I have to say too, I am working on a very large (3.4 GB) image, if that matters. Does anyone have anything I can try to minimize this issue? Thanks much.

Glenn
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Glenn Davy

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Posted 2 months ago

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Warren Heaton

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The MacBook Air is a pretty capable machine.  As you're probably aware, its primary limitations for heavy Photoshop documents are the built-in display and the maximum RAM.  Have you checked the document efficiency while working with it?

It's probably worth giving this a read (I re-read it now and again):
https://helpx.adobe.com/photoshop/kb/optimize-photoshop-cc-performance.html



-Warren
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Jeffrey Tranberry, Sr. Product Manager, Digital Imaging

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Do you have rulers shown? I you hide rulers, do you still have a problem?
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Glenn Davy

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Thanks a bunch for this Warren. Appreciate the link, which I have read (re-read :) ). In this case I have the Cintiq 13 hooked up to the LT for purposes of comparing working on it vs. on the Retina on my iMac with the Intuos, so that's why I had such a large file open (ongoing project). Normally anything I'm doing on the Air is pretty small and I'd likely never see the issues I have this morning. In any event, it was good to take another read of that, as I'm sure it will help. By the by, I'm not having any of these issues on my iMac/Intuos so it's either graphic card issue or RAM in all likelihood. 

Thanks again Warren.

Glenn
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Glenn Davy

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Hi Jeffrey, I don't think I did to start out with but then yes. I can't remember if I had the issue with the rulers hidden or not, but it's something I can check out for sure. Please note my remarks to Warren above too. I don't view this as a major problem at this point as I was working on an obscenely large graphic for purposes of experimentation (unrelated to PS per se) so I was really pushing the limits on this. I just thought that there might be something I had set incorrectly that could be a quick fix, but as I said to Warren, I don't see this behaviour on my iMac (or at least not nearly to the same degree - it does happen occasionally, and yes, on that I always have my rulers showing). Can you tell me more about how the ruler can affect this please?

Thanks Jeffrey

Glenn
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Glenn Davy

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OK, I've been working on my iMac on the same image and it's started happening there as well. I did turn the rulers off, and I'm continuing to get the graphics corruption. Again, cycling the layer off then on gets rid of it but it comes back pretty quickly again. The iMac has 32 GB RAM and an i7 multi-core processor, AMD R9 395x 4GB graphics processor. I'm using the latest version of Mojave and PS v20.0.4. I could turn off Graphics Acceleration to see if that does anything but the test won't be all that accurate as I'm using functions that require the acceleration. Primarily this seems to happen when I use the brushes, which I'm doing a lot of with this graphic. The file I'm working on is approaching 3.7 GB and is saved as a PSB format. Hope there is some help for this.

Thanks.
Glenn
(Edited)
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Glenn Davy

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This is now happening with just about every brush stroke. It seems the longer I work on the graphic, the more frequently this occurs. Each time I dab with the brush, the corruption changes location and characteristics (blanks, lines, colours). See below the screenshot illustrating what I'm seeing.

Glenn

EDIT:  Since hiding the rulers then *restarting* PS, I've not had a repeat of the graphics corruption. Might be tied to the ruler after all. Still working with it and I'll report back once I've got a bit more time on it. 


(Edited)
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Glenn Davy

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OK Jeff, thanks for the idea about the rulers. I have hidden the rulers and have been painting for about 3 to 4 hours now and have not had a repeat of this issue, at least on the iMac (I'll try on the MacBook/Cintiq this afternoon, but I expect the results will be the same - I'll report back later today if I find the issue is still happening on that system with the rulers hidden). So there is some interaction apparently between the ruler operation and the graphics drivers. Hopefully this is something Adobe can address as I do use the rulers extensively.

Thanks.

Glenn
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Glenn Davy

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I take it back. It's started happening again and I haven't had my rulers selected at all. Oh well... .

Glenn
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Mark Payne

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I don't mean to interrupt with an irrelevant question, but the search here doesn't seem to bring up relevant threads.

Is there a way to avoid the diagonal line when using shift to draw consecutive lines yet?

Now that I'm re-learning brushes, I wish the forum had it's own brush section.