4K and 8K are processed piece by piece in LTX-2.5's new workflow

LTX-2.5 adds a Native Resolution workflow for processing video at up to 4K and 8K on a single GPU. Tiled Fusion works across overlapping regions within a shared latent space, while two new IC-LoRAs, Refine and Restore, target enhancement and restoration.

One full-frame pass, then regional processing

Processing an 8K video without loading the entire operation into memory at once. LTX-2.5's Native Resolution workflow splits the process into two stages.

The first operates on the full image at an initial resolution to establish composition and the selected IC-LoRA effect. The latent is then enlarged to the target resolution before Tiled Fusion processes overlapping spatial regions.

Those regions are not independently generated and stitched together afterward. They remain part of the same latent canvas and share one noise field throughout sampling. The overlap is intended to reduce visible discontinuities between regions. Up to 8K on a single GPU

The workflow provides three output options: Full HD, 4K, and 8K. For the 8K path, LTX-2.5's latent spatial upscaler is applied twice before the Tiled Fusion pass.

The workflow is designed around a single-GPU path, but LTX explicitly notes that this is not a performance guarantee. Memory requirements and runtime depend on resolution, tile size, temporal window, model stack, and decoding settings, among other factors.

The documentation therefore recommends benchmarking the intended configuration and peak VRAM on the target production hardware before processing a full shot. Tile boundaries and low-frequency gradients should also be inspected, as overlapping regions do not guarantee completely seamless output. Refine adds detail after upscaling

Two new IC-LoRAs accompany the workflow. Refine targets footage that has already been enlarged but remains soft after conventional resizing.

An HD shot can, for example, be taken to 8K before Refine generates the fine detail expected at that resolution. The intent here is to remain faithful to the source rather than deliberately changing its appearance.

LTX also demonstrates an HD plate processed through Native Resolution to 8K before being exported as an EXR for further work in Nuke. Restore intentionally changes the look

Restore addresses a different use case. The IC-LoRA targets archival and lower-resolution footage, with LTX demonstrating a 540p source taken to 4K.

Unlike Refine, Restore is not solely intended to preserve the original appearance. It adjusts color and sharpness to give older footage a cleaner finish closer to modern digital capture.

The distinction between the two is functional: Refine fills in detail after enlargement, while Restore can deliberately alter the appearance of the source. A ComfyUI workflow available directly

Native Resolution is currently documented as a ComfyUI workflow. The published setup uses LTX-2.5 and exposes controls for the initial canvas, output resolution, and the regions processed by Tiled Fusion.

LTX notes that IC-LoRAs need to match the selected model version and workflow. The documentation does not currently cover an equivalent native Python path.

The Native 4K/8K workflow is publicly available, while the Refine and Restore weights can be downloaded from Hugging Face.