[DTolm]

Well, most likely I won't be able to help explaining the fluctuation easily then, as you have spent a lot of time on it already. It would be cool to try VkFFT in this usage scenario at some pont in the future though - it also can do 1D FFTs of grouped in matrix sequences.

[datenwolf]

As I already mentioned over at https://www.reddit.com/r/vulkan/comments/i2ivzh/new_vulkan_f... I'm going to do that. And will let you know how it goes.

[DTolm]

If you happen to need any assistance in refining VkFFT for your use case, feel free to contact me.