Problem may be: Poser is using "transparency" and means "alpha". Other render-engines may make a difference here. Especially unbiased render-engines because of trying to simulate a typical transparency-behaviour (refraction and other things). Alpha means "not there".  This is different.

Importing a figure with Interposer to C4D may convert transparency to alpha.

Poser materials for lashes often have a bump-map. Delete this.

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