Why does trying to export crash the app?

[Giverly of Dunbar]

I’m using Photo2 on an iPad Pro, editing a large image. It’s editing it fine without delay but when I try to export it the app crashes. I’ve also tried to merge the layers (thinking that might reduce the size) but that also crashes the app. I don’t really want to resize smaller if I can help it, as I’ll just have to make it larger again later. I have enough space on my iPad to save the image. 
 

I’ve attached an IPS file from today but I don’t understand it. Do you? 

Photo iPad-2023-09-04-125359.ips

[Lee D]

@Giverly of Dunbar Can you provide a copy of your Affinity file that you're trying to export? If the file is private you can send me a download link via DM if you wish.

Which format are you exporting out to and have you try any other formats?

Where are you selecting to export the file to, local or cloud storage?

[Giverly of Dunbar]

Thanks @Lee D This is it as an affinity file. I didn’t get to choose any export options it crashes as soon as I press Export. But I want to export in png to google drive. 

My iPad is saying it’s full, even though this morning it had several gb free and I’ve only edited a couple of images (perhaps apps have updated?). But I’ve now permanently deleted 100 videos to free up space and still get this crashing problem. 

portrait-of-friedericke-maria-beer.afphoto

[Lee D]

@Giverly of DunbarThanks for the file.

I tried exporting first and it did indeed cause the app to close. If I reopened and resized it below 10,000 pixels (I resized to 9000x6000, which is still a large image) it then exported to a few different formats without closing the app.

Can you try this on your iPad to see if it at least allows you to export while I continue to do some testing.

[Giverly of Dunbar]

@Lee D Yes thanks. I downsized it and was able to export it then I opened the new single layer png file and resized it back up to 10800x7200 and was able to export it at that size. So I think combination of layers and over 10000 was too much? 
 

 

[Giverly of Dunbar]

@Lee D I’m wanting to print these at 36x24 inches 300dpi so they are going to be big files but something that confuses me is why file size can vary a lot even when the pixels and file type are the same. Eg earlier I tried saving a 10800x7200 png and it was over 300mb but usually they’re around 100mb 🤷🏻‍♀️ 

 

[Paul Mudditt]

On 9/5/2023 at 2:27 PM, Giverly of Dunbar said:

@Lee D I’m wanting to print these at 36x24 inches 300dpi so they are going to be big files but something that confuses me is why file size can vary a lot even when the pixels and file type are the same. Eg earlier I tried saving a 10800x7200 png and it was over 300mb but usually they’re around 100mb 🤷🏻‍♀️ 

 

What is your expected viewing distance, 300 DPI seems to be very high for such a large image, to see it properly you a likely needing to stand 1.5 to 2 metres away and your eyes cannot resolve 300 DPI at that distance. My suggestion would be to use a more practical DPI of around 120 DPI.

https://prinfab.com/blog/viewing-distance-and-dpi/

https://photo.stackexchange.com/questions/17835/how-to-calculate-viewing-distance-for-a-print-size

https://resources.printhandbook.com/pages/viewing-distance-dpi.php

[Giverly of Dunbar]

@Paul Mudditt it’s for selling as digital download art on Etsy so it needs to be 300dpi as that would be expectation, even if not really necessary. Other people sell at this size so I don’t really want to be offering smaller…

For my personal use I’ve printed at 150dpi and it’s been fine, I don’t notice any pixelation.