Digital painting in large format using the Mixer Brush at 1% spacing, any optimal PC specs?

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Hello!

I'm looking to put together a PC for large format digital painting, specifically with the Mixer Brush tool. I'm using Photoshop CS 6.

I was wondering what ballpark specs (GPU, RAM, Processor, Scratch disks) in a pc I’d be looking at if I’d like to do the following without lag,

(1)use a mixer brush on a 6400 x 6400 px canvas at brush size 512px and 1% spacing. (sample all layers is turned off) Also I dont go beyond 3 layers.

(2)brush has a 4000px by 4000px texture loaded

(3)flow mapped to pen pressure

(4)scattering is enabled, both axes enabled, count is at 6 and count jitter is mapped to pen pressure.

(5)smoothing is enabled

(6)shape dynamics is enable, with size mapped to pen pressure and a min diameter of 80%, angle jitter is mapped to rotation.

Thank you!
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Dodeqaa Polyhedra

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  • unsure :D

Posted 3 years ago

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Dodeqaa Polyhedra

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Any ideas anybody?
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Jaroslav Bereza

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I'm not an expert on hardware, but this will take a lot of RAM. Perhaps 32 gigabytes of RAM? Maybe more? Anyway, I'd spacing increased, if that were possible. Each added +1 in percentage will help a lot. 5% spacing means 5 times faster painting.

Also you need very strong processor. I am not sure if this is GPU accelerated.
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Dodeqaa Polyhedra

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Thank you for your reply Jaroslav Bereza!

My rig at work is running 32gb DDR3 1700 and I'm running into lag all the same, maybe I need some ddr4s?
Also, it might be that I have a weak processor, Intel i7-3770. Also my graphics card at work is a gtx 570.

The reason I'm asking is because I'm not sure if, with the settings I mentioned, it is even possible for the latest hardware.
I could go get 128gb of ram and the latest processor and gpus, but I really thought I should do my research before breaking my bank hehe.

Unfortunately I can't increase the spacing any, and I know with those settings its very trying for the pc, but im also wondering if the experts have any ideas on this?

Again, thank you for taking the time to reply to this Jaroslav Bereza!
(Edited)
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Jaroslav Bereza

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Much RAM is needed if you have a large bitmaps and lots of layers. 32 gigabytes is a lot. Look how much RAM Photoshop uses and how many swaps to disk. I think processor will be a bottleneck. I have Intel Core i7-4790K, 32GB RAM and still lag. It seems that the process is programmed to use one core and can not use them all. 

I am afraid... what you want is imposible with ordinary high-tech procesor.
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Dodeqaa Polyhedra

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Yea seems like it huh, thanks for sharing your specs Jaroslav Bereza!
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eartho

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I wish someone from Adobe would comment on this topic. It'd be extremely helpful to know if the mixer brush response is improved by GPU or CPU upgrades. 
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Chris Cox

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The mixer brush doesn't use the GPU, just CPU.  And painting is very much dependent on CPU speed and DRAM speed.
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Dodeqaa Polyhedra

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Hello Chris, thank you for that information.

With the factors listed in the original post, do you think a combination of an Intel i7 5960k Processor and 128gb DDR4 3000Mhz CL15 DRAM  manage lag free painting?

Just your personal take on this, not as a representative of Adobe or anything.
I understand that these variables might not have been tested and its quite a stretch.
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Dodeqaa Polyhedra

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Thank you for the comment eartho!