Thank you Snarlygribbly.

The fact is that Reality actually traverses all the nodes of the poser shader and converts as much as it's possible.

The issues arise only when using very complex shaders that use esotheric capabilities of Firefly. There is actually no need to strip the shaders in the vast majority of the cases. For example, the image attached, from Syyd's Oxygen, works just fine.

Cheers.

Paolo

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