HI,
I Start Zbrush, to try to make good sofa photogrammetrie. I clean, but to make a good model i Split some part to have better occlusion and most realist looking.
When i Split some part i have a model with BIG hole and do a dynamesh but the new shape done are not really good and i must a lot of time to reshape. Picture to see an exemple.
Did you have Advise to do better and less time consuming.
If you have a solution that will help me alot.
TK Y
This is just how Zbrush fills large, concave holes. It doesn’t have any way to guess how a user wants geometry created that isn’t there.
If the cushions and the base are a single object rather than two cleanly separate ones, and that hole is the result when you split the cushions off, then you will have to manually create that geometry in some fashion. If you desire there to be some sort of detail there, then you will have to sculpt that detail manually. Again, Zbrush can’t guess at how to create something that isnt there.
First, I would duplicate the original mesh into a duplicate subtool. The original will remain unchanged, and the source mesh for projecting any lost detail. From the duplicate subtool, then split the the cushions off into yet another subtool. Fill in the holes on both objects, and sculpt them into desired shape.
You may find this easier to do at low poly rather than high–more efficient control with just a few verts rather than millions. In which case Zremeshboth the Base and cushion subtools into low poly objects with decent topology. ZRemesher, unlike dynamesh, will not fill in the holes. You can then fill in that geometry and shape it as desired, then subdivide both the base and the cushion subtool back up to high res, and project any lost detail from the original to each in turn.
Again, this will only project detail that was there in the first place. If you want there to be some sort of detail in the portions that you have created, you will also need to create that detail manually.
I clean, but to make a good model i Split some part to have better occlusion and most realist looking.
Allow me to also address this point specifically. If your goal in separating the mesh into separate objects is solely to create deeper cavities for rendering purposes, then you could maybe save yourself some work with a bit of sculpting.
Rather than splitting the mesh, you could chisel at those crevices a bit with the Dam Standard brush. It is very good at carving out recesses.
You could also Mask by Cavity (tool > Masking > mask by cavity), invert the mask so that all but the cavities are masked, and perform a negative inflat (Tool > deformation > Inflat). You may have to fill in unwanted gaps in the masking after inverting with a masking marquee or brush.
In other words, only exert the effort to split the mesh into separate pieces if you actually require physically separate pieces. Rendering results can be approached in other ways.
Thank you for your return, I will try both solution.
