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Add clarifying comment to explain why noise might be None in latents_from_embedding().

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Ryan Dick 2024-06-12 20:02:33 -04:00 committed by Kent Keirsey
parent fa183025ac
commit 9dd779b414
1 changed files with 2 additions and 0 deletions
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invokeai/backend/stable_diffusion/diffusers_pipeline.py
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@ -298,6 +298,8 @@ class StableDiffusionGeneratorPipeline(StableDiffusionPipeline):
batch_size = latents.shape[0]
batched_t = init_timestep.expand(batch_size)
# NOTE(ryand): noise will be None if we are running the SDXL refiner. I can't think of any other reason that
# we'd want noise to be None, but I didn't write this logic, so there might be a reason I haven't thought of.
if noise is not None:
# latents = noise * self.scheduler.init_noise_sigma # it's like in t2l according to diffusers
latents = self.scheduler.add_noise(latents, noise, batched_t)