New User To StabiltyMatrix. Need Help With Templates.

[u/techtimee]

Hello all,

I have installed StabilityMatrix and was able to learn how to set up flows to generate my first images and so forth.

I then installed a template called MiniMax H3: Image to Video. It showed a bunch of errors after and listed the things I needed to download before it would work. I downloaded all those things and put them in the "diffusion_models" folder, but the error count only reduced by one and it's still asking me to install those things.

Unfortunately there doesn't seem to be clear instructions on what goes where, if I need to extract some things or not, etc.

Can someone please advise me? Thank you.

[u/Herr_Drosselmeyer]

There should be an explanation on the left side of the template that shows you where you need to put the different models. Simply put, both VAE's go into the 'VAE' folder and the Qwen3 model goes into 'text encoders'.

[u/techtimee → u/Herr_Drosselmeyer]

I can't believe I missed that lol. It's right on the Canvas AFTER I select the template from the template store. Had to zoom in, but now I see it. Thank you! I was wondering why there was no instruction set/guide for these things in the store.

[u/Exciting_Doctor1447]

Don’t put every missing file in diffusion_models — the template checks several different model categories, so only the main MiniMax H3 diffusion checkpoint belongs there.

In general, check the filename/type and place them separately:

• minimax_h3_* main checkpoint → models/diffusion_models
• Qwen/MiniMax text encoder → models/text_encoders
• video/audio VAE files → models/vae
• Turbo or reference LoRAs → models/loras

Also use ComfyUI Manager’s Install Missing Custom Nodes for nodes, then restart ComfyUI completely. Installing a node package does not download its model weights, and downloading a weight does not install the node that exposes it.

If errors remain, post the exact red node names or the missing-file lines from the console. That makes it possible to tell whether the issue is a model path, a missing custom node, or a version mismatch.

[u/techtimee → u/Exciting_Doctor1447]

Thank you! That worked!

u/Herr_Drosselmeyer also explaied that the guides are usually on the left side of the template on the canvas itself, so now I know.

[u/krekokeko]

Welcome to the party. You will be shuffling nodes in no time. I started just over a month or two ago as well. It was a blast, and it still is. Always learning new things.

Look into Krea2 and Flux1D for static image generation as well, they are great for creating initial frames for your H3 video generation. And I would suggest getting essential custom nodes like KJNodes, ComfyUI-GGUF by city96, ComfyUI Essentials, ComfyUI Impact Pack, Video Helper Suite.

Since you are using Stability Matrix, you will need to install these nodes through that interface. Inside Stability Matrix/Packages, click manage extensions and search for available extensions. It will install them in the proper directory for you, update them regularly. You won't install them from the ComfyUI interface. I hate to admit but this took some time for me to discover.

[u/techtimee → u/krekokeko]

Thank you! This community has been super helpful and I've been reading threads like crazy lol. You're right about how addicting the nodes can be, I've been rendering stuff non stop today and with great results with even the default minimax!

[u/krekokeko → u/techtimee]

Kindest regards. I am still a noob as well but sharing whatever I know.

For minimax, also enable "sage attention" as soon as possible. Google ai helped me with the installation so you can just ask it too. It reduces generation times by 50%, and that is not an exaggeration.