Shouldn't fix_noise_scheduler_betas_for_zero_terminal_snr be applied BEFORE prepare_scheduler_for_custom_training?
#1.905 aberto em 27 de jan. de 2025
Métricas do repositório
- Stars
- (7.201 estrelas)
- Métricas de merge de PR
- (Mesclagem média 18h 39m) (16 fundiu PRs em 30d)
Description
Hello,
Reference code: https://github.com/kohya-ss/sd-scripts/blob/0778dd9b1df0d6aa33287ded3ce4195f3d03251b/train_network.py#L195
I noticed that fix_noise_scheduler_betas_for_zero_terminal_snr modifies the alphas_cumprod for the noise scheduler, and prepare_scheduler_for_custom_training uses alphas_cumprod to calculate all_snr. The issue with the current order is that all_snr will reflect NON-ztsnr snrs, not ztsnr, causing anything that uses all_snr to use snrs that do not align with ztsnr.
As such, shouldn't fix_noise_scheduler_betas_for_zero_terminal_snr always be applied before prepare_scheduler_for_custom_training?
Thank you.