Delta Mix 2.9B Qwen 3,5 4B

Delta Mix Qwen 3.5 4B

Dual-encoder routing for Anima 2B / 2.9 / 3.8-0.6B.

Keeps the native Qwen 0.6B clip and adds Qwen 3.5 4B only where you ask it to.

This is glue, not a new text encoder. The 4B loader and weights stay with the original pack.

A separate page for the method is available at https://civitai.red/models/2964040/delta-qwen-35-4b?modelVersionId=3358244

What it does

Two encodes of the same prompt: stock 0.6B on the edges, 4B in the middle.

Default mode blocks_ortho projects 4B toward native space, clips per-token spikes delta_guard), then injects a soft block window.

Start at strength 0.50 / delta_cap 0.50 / guard on. That is a visible start, not an optimum. The checkpoint moves more than the sliders.

Works on 2B (28), 2.9 (40), and 3.8-0.6B (52). Not the 3.8 Q35 connector pack.

Downloads

This pack (nodes + example workflow)

- GitHub: https://github.com/bestluner-create/Delta-Mix-Qwen-3-5-4B

- Same zip and workflow are attached on this CivitAI page under Files.

Required — 4B loader (not bundled)

- Nodes: https://github.com/GumGum10/comfyui-qwen35-anima

- Idea / original 4B-on-Anima page: https://civitai.com/models/2455272/anima-2b-qwen-35-4b-text-encoder

- Weights + sidecar: https://huggingface.co/lylogummy/anima2b-qwen-3.5-4b

Put qwen35_4b.safetensors in models/text_encoders/.

Put rotation_matrix.safetensors and qwen35_tokenizer/ in custom_nodes/comfyui-qwen35-anima/.

Required — native Anima TE

- qwen_3_06b_base.safetensors → models/text_encoders/

(stock Anima CLIP, CLIPLoader type qwen_image or stable_diffusion)

Install both custom_node folders, restart Comfy, load the workflow from Files.

Required for 2.9 / 40-block checkpoints

Without this patch ComfyUI still loads the file as 28 blocks and silently drops 12 layers.

https://github.com/gazingstars123/ComfyUI-Anima-2.9B

Same text → CLIPTextEncode 0.6B (edge) and CLIPTextEncode 4B (center), pos and neg.

LoRA on MODEL only. Do not LoRA the 4B CLIP. Do not lerp the two conds before the node.

LoadQwen35AnimaCLIP: alignment ON, 0.5.

(cap strip)

Same seed, same prompt, strength locked at 1.00.

1 Base — node off, native 0.6B only.

2 cap 0.25 — 4B on, tight per-token clip.

3 cap 0.50 — default cap, strength still 1.00.

4 cap 0.75 — clip loosened.

delta_cap is not “more style”.

It is the per-token ceiling on |C_4B − C_0.6B|.

Low cap keeps the lock (goggles, heart, stance).

High cap at strength 1.00 lets 4B rewrite pose and outfit.

Raise cap only after strength is already set.

delta_cap — how large a single token residual may be versus native 0.6B.

Default 0.50. Lower = closer to Base. Higher = 4B may move props, pose, clothes.

Does nothing if delta_guard is off. Pair with strength; do not slam both to 1.00.

(strength strip)

Same seed, same prompt, delta_cap locked at 0.50.

1 s 0.25 — 4B barely in.

2 s 0.50 — pack default.

3 s 0.75 — pose starts to sit.

4 s 1.00 — sleeves and stance rewrite.

strength is how much of the already-clipped 4B residual is added.

cap decides the ceiling; strength decides how far you walk toward it.

0.25–0.50 keeps the lock. Past 0.75 the camera and clothes move first.

strength — mix amount after guard: C = C_0.6B + strength × D_guarded.

Default 0.50. This is the main “how much 4B” knob.

Leave cap at 0.50 while you find a strength that still holds the pose.

CheckpointLoader          Anima 2B / 2.9 / 3.8-0.6B
CLIPLoader                qwen_3_06b_base.safetensors
                          type: qwen_image  (or stable_diffusion)
LoadQwen35AnimaCLIP       qwen35_4b.safetensors
                          alignment ON, strength 0.5
                          calibration OFF, output_scale 1.0
VAELoader                 qwen_image_vae.safetensors
EmptySD3LatentImage       your size

same POSITIVE text ──► CLIPTextEncode (0.6B) ──► cond_edge_pos
                   └─► CLIPTextEncode (4B)   ──► cond_center_pos

same NEGATIVE text ──► CLIPTextEncode (0.6B) ──► cond_edge_neg
                   └─► CLIPTextEncode (4B)   ──► cond_center_neg

LoraLoader                MODEL only
                          CLIP slot = 0.6B if the LoRA has TE keys
                          do not attach LoRA to the 4B CLIP

DeltaQ4B Apply
  model            ← Checkpoint / LoraLoader
  cond_edge_pos    ← 0.6B positive
  cond_center_pos  ← 4B positive
  cond_edge_neg    ← 0.6B negative
  cond_center_neg  ← 4B negative
  mode             blocks_ortho
  strength         0.50
  delta_guard      True
  delta_cap        0.50
  center_start/end  8/19   (2B)
                    10/29  (2.9)
                    14/37  (3.8)
  taper            4
  enabled          True

KSampler  ← model / positive / negative from DeltaQ4B Apply
VAEDecode ← KSampler + VAE
SaveImage

2B 28 blocks → 8–19

2.9 40 blocks → 10–29

3.8 52 blocks → 14–37

inset 1–2 from the edges, taper 4

Compatibility

The node runs on Anima 2B (28 blocks), 2.9B (40) and 3.8B-0.6B (52).

Change the center window to match the stem. It is not the 3.8 Q35 connector pack.

Sample cards on this page use a 2.9-based merge.

Credits

Anima 2.9B — architecture and official 2.9 checkpoint

[gazingstars321 / Anima-2.9B](https://civitai.com/models/2855007/anima-29b)

4B-on-Anima idea — original method this pack routes around

[LyloGummy / Anima 2B Qwen 3.5 4B Text Encoder](https://civitai.com/models/2455272/anima-2b-qwen-35-4b-text-encoder)

Anima itself is CircleStone Labs. 4B loader and weights stay with GumGum10 / lylogummy (linked in Downloads). This page is the dual-encoder glue only.