One of my goals this year is to release some tutorials for things I had to do tons of research myself, and haven't seen any proper tutorials on especially in the context of adult games.
Below are some general tutorial ideas I have, please pick what you're most interested in.
Modeling: Best practices modeling for animation in hentai games
Modeling: Hair modeling and texturing
Animation: Motion examples for sex animation to create "impact"
Animation: Guidelines for animating 2D images in Unity with Anima 2D
Technical Art: Custom PBR shaders with Amplify Shader
Technical Art: Animation FBX exporting in blender with multiple simutaneous characters.
Technical Art: Optimizing asset workflow for future expansion (getting 3D work done first, and improving it later)
Technical Art: Quirks of exporting from blender into Untiy
Technical Art: How to use cinemachine for sex animations
Character Design: Ideas for appealing character design
Character Design: Drawing references of cartoony 2D characters for 3D modeling
Painting: Painting a scene without "lines"
Painting: Picking colors for a painting quickly