GPU not use the ‘normal ram’ (shared) at general - especially for AI model (if you select the GPU in the preferences)(. You already experience that → as if its can use as ‘shared’, than no issue raised expected.
Seems the pre-defined AI mask (‘Keyword’, like: Sky) not friend with 6GB GPU VRAM + Exporting. Actually i think in his forum near all ‘AI mask crash/mask Internal error/Export error’ related with that Pre-defined (‘Sky’) vs GPU VRAM amount. Practically all AI / NR / Export use some GPU VRAM amount. For example (to get the concept): ‘Manual AI mask’ AI model use less GPU VRAM than ‘pre-defined Sky AI mask’. DP3 NR use less the DP XD2s, and so on. I have no idea about X-trans usage, but i guess its same or more than DP DX2s. Loupe / DeeprimeRendering also also use some GPU VRAM amount, etc. And Export use ‘again’ - as you can edit while export running → export need to ‘run again’ the ‘pre-defined Sky AI model’ (at least some similar). And you simply ‘runs out’ for GPU VRAM (during export).
If you use manual AI mask (selection, area) and not use ‘pre-defined AI’ → you may just fine in Export. May use DP3 (if possible, i’m not familiar with Xtrans) may more in the safe side.
May worth to try this export small ‘trick’!:
It’s may also help.
Deeprimerending?
Its like ‘loupe’ in the full editing screen.
A new option to view the effects of global and local DeepPRIME denoising in the editing window, full screen and at all zoom levels, while editing.