Renderotica

Now, I've owned Golden Palace and Storming The Palace for years, but have only fairly recently got back into actual rendering, and am just now starting my first explicit sex scene - first since a long time pre-Meipe (the last was using a modified SP3 with D3!). This is to be a sequence of renders, part of a longer story, not just some one-off image.

I'm struggling with GP and how I need it to be for how I want the scene to start. I'm probably being stupid - brain fog and a memory that doesn't even work moment to moment as side effects from pain meds due to disability - but it's as if there's something holding especially the lower (or rear if she was standing up) of the labia minora apart, like some 'open' morph, or the default shape is just rather open. But I can't find any open morph non-zero. And I can't find a morph that will close it up if it's the default shape. the close morphs just fold the outer edges of the labia in while keeping the bottom edges well separated.

It's going to be fine once the scene progresses and the Dicktator goes in, but at this moment the base of the labia minora should be closed, with their outer edges 'butterflied' apart by the tip off the Dicktator gently sliding up, not yet pushing in. There's even a preset or two in Storming The Palace that essentially look right, but when I apply them the bases of the labia are still further apart then I want, and further apart than in the thumbnails (and store promo images) of those presets. What's keeping the bases of the labia minora apart, and how can it be counteracted?