Custom Models

Sulphur 2 is not a new video architecture developed independently from LTX. Its model card identifies LTX-2.3 as the base model, with Sulphur 2 positioned as an LTX-2.3 derivative. The release supports native text-to-video and image-to-video generation and is intended for local use through the open LTX ecosystem.

The Sulphur 2 model card explicitly describes the model as uncensored. This makes it particularly relevant for users interested in content that may be restricted by commercial video-generation services, including NSFW and adult-oriented visual content. The model is distributed for local use rather than as a hosted commercial generation service, so the generation environment and its applicable rules are determined by the user and the tools used to run the model.

The project is specifically presented as an uncensored alternative to the safety restrictions found in many hosted video-generation systems. Community testing and release materials also discuss its use for NSFW generation. However, "uncensored" should not be interpreted as a guarantee that every prompt or every generated result will work as intended. Output quality still depends on the model, workflow, prompt, input material, and inference setup.

The official Sulphur 2 repository provides a distillation LoRA as part of the release. The documented setup recommends using the provided distill LoRA with one of the Sulphur 2 development checkpoints, or using the full model instead; the repository explicitly warns not to use both the LoRA and the full model together. This LoRA is primarily part of the faster distilled inference path, rather than a separate NSFW LoRA trained specifically for adult content.

The published release includes BF16 and FP8-mixed development checkpoints, a distilled model path using a provided LoRA, and ComfyUI workflows for text-to-video and image-to-video. The repository also includes a locally runnable prompt enhancer. This makes Sulphur 2 a broader model release rather than a single checkpoint file.

For OpenLTX, Sulphur 2 is relevant as a concrete example of an LTX-2.3-based custom model with a clearly different generation policy and target audience. It retains the underlying LTX-2.3 foundation while providing a community-built alternative focused on uncensored generation and local experimentation. More detailed setup instructions, model comparisons, workflows, and testing can be added as the OpenLTX resource library expands.