Unable to export PSD with large perspective distort

[CrazyInfin8]

I noticed one of my projects did not want to export as a PSD. After investigating, I believe I have narrowed down the problem to a certain perspective transform.

How to trigger:

1. Create a new project.
2. Add an image (Might work with other types of layers, I just found a large stock image reproduces this the easiest).
3. Add a perspective distort live filter.
4. Set the source of the perspective live filter to a small region of the screen.
5. Set the destination to a sufficiently larger area of the screen.
6. Select export.
7. If it is not selected yet, select PSD as the target format.

What happens:

Sometimes Affinity Photo may freeze and lock up (temporarily or sometimes until killed). Once the export window opens, you will notice that it never creates a preview for your PSD export. If you choose to export anyway without waiting for a preview, Affinity may freeze for a bit, show a progress bar, then after it fills it will fail with an error. I tested this on Windows using Affinity Photo/Designer/Publisher version 2.0.4 but noticed that this issue seems present on my iPad Pro (at least in Photo version 2.0.4).

In the attached screen capture, I pressed CTRL+ALT+SHIFT+S (to export) around the 1:00 minute mark which did temporarily freeze the window. Then the export dialog box appeared but will not create a preview. After hitting export, Affinity prints "An error occurred while exporting to: <file name.psd>".

Perspective distort can export as the end of the screen capture shows with the default perspective warp. But zooming into a small section using perspective warp has some issues.

[Circulus]

Confirmed on beta 1790 windows.
It just hangs on the preview window in export mode and pressing the export button it freezes the program altogether.

Edited May 12, 2023 by Return

[NathanC]

Hi @CrazyInfin8,

Many thanks for providing detail along with a recording, I can confirm I've replicated this and logged it with the developers.