Something we see all to often in renders is ill fitting clothes, especially around large breasts, even in published VN's.
Some tips to help fix this are:
'Fit Control',
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It's very good for smaller tweaks. Results will vary, but usually pretty good. It installs onto the clothing a whole host of morphs to adjust, including some reveal morphs, and you can remove all the unused ones you don't want.
However I think the best results are DIY in Blender. Below is an example of one I made.
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It can be a bit of work, but all together a nice bit a detail, and better look, I think.
Naturally the more you get used to it, the quicker the process becomes. Here's the tutorial I used.
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A couple of differences from the video and Blender 3.5 are.
Use Import OBJ Legacy
Use the following import/export settings.
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