Serious Storage Destruction Bug In Affinity Photo

[Ibrah]

I have a file at 400 DPI, 169 x 50 inches. The file size is a little over 2 GB. When I try to apply a zoom blur at over 1000 px over a pixel layer with perlin noise on it and nothing else, a temporary file is created in  C:\Users\User\AppData\Local\Temp\Affinity\Photo\1.0 titled "PersonaBackstore.dat" as it's applying the zoom blur filter, the file size keeps increasing very fast until my drive reaches capacity, the file stopped for me at over 90 GIGABYTES (my current capacity). Is this normal? There's no way this is efficient code if the whole document is 2 gigabytes. Is this a deadly bug? or is this normal for this big of a canvas/DPI when using the zoom blur filter? 

There is nothing inside my document but one pixel layer and Perlin noise applied, anyone should be able to replicate this problem if it's a bug in the code.

[Ibrah]

Here's the file if anyone wants to recreate it themselves. I wish we could at the very least choose which Drive stores the PersonaBackstore.dat Sunbeam.rar

[stokerg]

Hi @Ibrah,

Thanks for the file.

I was able to replicate the issue and when personalbackstorage.dat starts being used by Affinity its due to having ran out of memory to process the image and starts writing to disk.  If you resize the image, then apply the zoom blur, it works.  I resized to 50inch by 12 and was able to apply the blur without issue.  

I'll get some advice from the QA team as well to see if this is to be expected for a file of this size.  Just out of curiosity, what is the end plan for this file?   It's not often i see an image of this size, so always interesting to know what it's going to be used for  

[Ibrah]

1 hour ago, stokerg said:

Hi @Ibrah,

Thanks for the file.

I was able to replicate the issue and when personalbackstorage.dat starts being used by Affinity its due to having ran out of memory to process the image and starts writing to disk.  If you resize the image, then apply the zoom blur, it works.  I resized to 50inch by 12 and was able to apply the blur without issue.  

I'll get some advice from the QA team as well to see if this is to be expected for a file of this size.  Just out of curiosity, what is the end plan for this file?   It's not often i see an image of this size, so always interesting to know what it's going to be used for  

I’m trying to create a sunbeam light effect as a layer for my project. I’m doing art for a store in the form of wallpaper and I want to get the highest quality print I can get. The wall dimensions are 196” x 50”. Only problem with doing this at a smaller scale then resizing is having visible pixels in the finished product.