From 80b7c9455bf7afba7a9e95a1eb76b172408ab56c Mon Sep 17 00:00:00 2001
From: comfyanonymous <121283862+comfyanonymous@users.noreply.github.com>
Date: Sat, 13 Sep 2025 15:03:34 -0700
Subject: [PATCH] Changes to the previous radiance commit. (#9851)

---
 comfy/ldm/chroma_radiance/model.py |  7 +--
 comfy/pixel_space_convert.py       | 16 +++++++
 comfy/sd.py                        | 69 +++++-------------------------
 comfy/supported_models.py          |  2 +-
 nodes.py                           |  7 +--
 5 files changed, 35 insertions(+), 66 deletions(-)
 create mode 100644 comfy/pixel_space_convert.py

diff --git a/comfy/ldm/chroma_radiance/model.py b/comfy/ldm/chroma_radiance/model.py
index f7eb7a22e..47aa11b04 100644
--- a/comfy/ldm/chroma_radiance/model.py
+++ b/comfy/ldm/chroma_radiance/model.py
@@ -306,8 +306,9 @@ class ChromaRadiance(Chroma):
 
         params = self.radiance_get_override_params(transformer_options.get("chroma_radiance_options", {}))
 
-        h_len = ((h + (self.patch_size // 2)) // self.patch_size)
-        w_len = ((w + (self.patch_size // 2)) // self.patch_size)
+        h_len = (img.shape[-2] // self.patch_size)
+        w_len = (img.shape[-1] // self.patch_size)
+
         img_ids = torch.zeros((h_len, w_len, 3), device=x.device, dtype=x.dtype)
         img_ids[:, :, 1] = img_ids[:, :, 1] + torch.linspace(0, h_len - 1, steps=h_len, device=x.device, dtype=x.dtype).unsqueeze(1)
         img_ids[:, :, 2] = img_ids[:, :, 2] + torch.linspace(0, w_len - 1, steps=w_len, device=x.device, dtype=x.dtype).unsqueeze(0)
@@ -325,4 +326,4 @@ class ChromaRadiance(Chroma):
             transformer_options,
             attn_mask=kwargs.get("attention_mask", None),
         )
-        return self.forward_nerf(img, img_out, params)
+        return self.forward_nerf(img, img_out, params)[:, :, :h, :w]
diff --git a/comfy/pixel_space_convert.py b/comfy/pixel_space_convert.py
new file mode 100644
index 000000000..049bbcfb4
--- /dev/null
+++ b/comfy/pixel_space_convert.py
@@ -0,0 +1,16 @@
+import torch
+
+
+# "Fake" VAE that converts from IMAGE B, H, W, C and values on the scale of 0..1
+# to LATENT B, C, H, W and values on the scale of -1..1.
+class PixelspaceConversionVAE(torch.nn.Module):
+    def __init__(self):
+        super().__init__()
+        self.pixel_space_vae = torch.nn.Parameter(torch.tensor(1.0))
+
+    def encode(self, pixels: torch.Tensor, *_args, **_kwargs) -> torch.Tensor:
+        return pixels
+
+    def decode(self, samples: torch.Tensor, *_args, **_kwargs) -> torch.Tensor:
+        return samples
+
diff --git a/comfy/sd.py b/comfy/sd.py
index cb92802e9..2df340739 100644
--- a/comfy/sd.py
+++ b/comfy/sd.py
@@ -18,6 +18,7 @@ import comfy.ldm.wan.vae2_2
 import comfy.ldm.hunyuan3d.vae
 import comfy.ldm.ace.vae.music_dcae_pipeline
 import comfy.ldm.hunyuan_video.vae
+import comfy.pixel_space_convert
 import yaml
 import math
 import os
@@ -516,6 +517,15 @@ class VAE:
                 self.working_dtypes = [torch.bfloat16, torch.float16, torch.float32]
                 self.disable_offload = True
                 self.extra_1d_channel = 16
+            elif "pixel_space_vae" in sd:
+                self.first_stage_model = comfy.pixel_space_convert.PixelspaceConversionVAE()
+                self.memory_used_encode = lambda shape, dtype: (1 * shape[2] * shape[3]) * model_management.dtype_size(dtype)
+                self.memory_used_decode = lambda shape, dtype: (1 * shape[2] * shape[3]) * model_management.dtype_size(dtype)
+                self.downscale_ratio = 1
+                self.upscale_ratio = 1
+                self.latent_channels = 3
+                self.latent_dim = 2
+                self.output_channels = 3
             else:
                 logging.warning("WARNING: No VAE weights detected, VAE not initalized.")
                 self.first_stage_model = None
@@ -785,65 +795,6 @@ class VAE:
         except:
             return None
 
-# "Fake" VAE that converts from IMAGE B, H, W, C and values on the scale of 0..1
-# to LATENT B, C, H, W and values on the scale of -1..1.
-class PixelspaceConversionVAE:
-    def __init__(self, size_increment: int=16):
-        self.intermediate_device = comfy.model_management.intermediate_device()
-        self.size_increment = size_increment
-
-    def vae_encode_crop_pixels(self, pixels: torch.Tensor) -> torch.Tensor:
-        if self.size_increment == 1:
-            return pixels
-        dims = pixels.shape[1:-1]
-        for d in range(len(dims)):
-            d_adj = (dims[d] // self.size_increment) * self.size_increment
-            if d_adj == d:
-                continue
-            d_offset = (dims[d] % self.size_increment) // 2
-            pixels = pixels.narrow(d + 1, d_offset, d_adj)
-        return pixels
-
-    def encode(self, pixels: torch.Tensor, *_args, **_kwargs) -> torch.Tensor:
-        if pixels.ndim == 3:
-            pixels = pixels.unsqueeze(0)
-        elif pixels.ndim != 4:
-            raise ValueError("Unexpected input image shape")
-        # Ensure the image has spatial dimensions that are multiples of 16.
-        pixels = self.vae_encode_crop_pixels(pixels)
-        h, w, c = pixels.shape[1:]
-        if h < self.size_increment or w < self.size_increment:
-            raise ValueError(f"Image inputs must have height/width of at least {self.size_increment} pixel(s).")
-        pixels= pixels[..., :3]
-        if c == 1:
-            pixels = pixels.expand(-1, -1, -1, 3)
-        elif c != 3:
-            raise ValueError("Unexpected number of channels in input image")
-        # Rescale to -1..1 and move the channel dimension to position 1.
-        latent = pixels.to(device=self.intermediate_device, dtype=torch.float32, copy=True)
-        latent = latent.clamp_(0, 1).movedim(-1, 1).contiguous()
-        latent -= 0.5
-        latent *= 2
-        return latent.clamp_(-1, 1)
-
-    def decode(self, samples: torch.Tensor, *_args, **_kwargs) -> torch.Tensor:
-        # Rescale to 0..1 and move the channel dimension to the end.
-        img = samples.to(device=self.intermediate_device, dtype=torch.float32, copy=True)
-        img = img.clamp_(-1, 1).movedim(1, -1).contiguous()
-        img += 1.0
-        img *= 0.5
-        return img.clamp_(0, 1)
-
-    encode_tiled = encode
-    decode_tiled = decode
-
-    @classmethod
-    def spacial_compression_decode(cls) -> int:
-        # This just exists so the tiled VAE nodes don't crash.
-        return 1
-
-    spacial_compression_encode = spacial_compression_decode
-    temporal_compression_decode = spacial_compression_decode
 
 class StyleModel:
     def __init__(self, model, device="cpu"):
diff --git a/comfy/supported_models.py b/comfy/supported_models.py
index be36b5dfe..557902d11 100644
--- a/comfy/supported_models.py
+++ b/comfy/supported_models.py
@@ -1213,7 +1213,7 @@ class ChromaRadiance(Chroma):
     latent_format = comfy.latent_formats.ChromaRadiance
 
     # Pixel-space model, no spatial compression for model input.
-    memory_usage_factor = 0.0325
+    memory_usage_factor = 0.038
 
     def get_model(self, state_dict, prefix="", device=None):
         return model_base.ChromaRadiance(self, device=device)
diff --git a/nodes.py b/nodes.py
index 76b8cbac8..5a5fdcb8e 100644
--- a/nodes.py
+++ b/nodes.py
@@ -730,7 +730,7 @@ class VAELoader:
             vaes.append("taesd3")
         if f1_taesd_dec and f1_taesd_enc:
             vaes.append("taef1")
-        vaes.append("chroma_radiance")
+        vaes.append("pixel_space")
         return vaes
 
     @staticmethod
@@ -773,8 +773,9 @@ class VAELoader:
 
     #TODO: scale factor?
     def load_vae(self, vae_name):
-        if vae_name == "chroma_radiance":
-            return (comfy.sd.PixelspaceConversionVAE(),)
+        if vae_name == "pixel_space":
+            sd = {}
+            sd["pixel_space_vae"] = torch.tensor(1.0)
         elif vae_name in ["taesd", "taesdxl", "taesd3", "taef1"]:
             sd = self.load_taesd(vae_name)
         else: