Hi @glen - Anything exported under 3D LUT / DCTL exports color transforms only. The DCTL does not include any texture fx including grain or halation. Resolve's built-in halation is much more performant and can easily recreate the native halation in Color.io.

Halation requires additional frame buffers. The current DCTL architecture in Resolve does not support this. While it is theoretically possible to get halation working in a DCTL, the performance would be pretty terrible as we'd have to run loops in pixel shader.

Here's a halation DCTL if you want to give it shot but my recommendation is to stick with the native halation plugin that comes with Resolve Studio: https://github.com/hotgluebanjo/halation-dctl