I am using the Victoria 7 figure with a geo-grafted prop (called "3feetwolf’s New Genitalia For Victoria 7") that apparently uses scripts to help marge the materials for helping enable a seamless look:
. . . the script will automatically adjust the UV and Shader of the new gens to match your character. Then the material settings of the character skin will be copied to the new gens. At last, the script will automatically use corresponding templates and character skin textures to generate required textures. When the script is finished, the new gens will be added to your character, and its materials and textures have also been set up completely.
Setup:
First, I instantiate a new Victoria 7 figure, apply all materials that came with the package and then add the geo-grafting prop (which automatically runs its scripts for the materials matching, etc.)
In Octane Render for Daz Studio (v 3.7.0.37), I sometimes have "Automatic material updates . . ." turned on, otherwise I go into its Materials tab and choose the "Missing . . ." option to have them migrate/interpreted all at once.
Results:
In 3Delight (with basic materials) and Iray (with Iray-specific materials), the geo-grafted item appears reasonably seamless with the figure, as advertised.
In Octane with either materials set, if "Try to map Geo Graft replacement materials internally" is not selected, then all edges of the prop where it grafted to the figure's "torso" appear "raised" over the figure's materials.
If I select that ". . . Geo Graft . . ." option in Octane, then the edges in the "torso" area disappear, but new raised edges appear in the "anus" section of the grafted figure.
So, the "Geo Graft" option definitely helps the outer edge become seamless with the figure while causing another area (which appears to be inside the graft) to fail, somehow.
NSFW links:
Without "Geo Graft" option (NSFW)
With "Geo Graft" option (NSFW)
I'm curious if there is anything I might try to help this situation so it can render fully seamlessly in Octane. Ideas welcome.