360 seamless pattern projection using an alpha in zbrush or sp

demigodssw

guys I cant find any way to project a pattern on a spherical object using an alpha without getting any seams basically i want something like the pattern of a football on a sphere for getting details normal map details.
Plz help

musashidan

What you're asking isn't possible. Projection painting is view/camera dependent. So as the distance from the camera falls away from perpendicular to parallel the texture projection will eventually 'smear' as it crosses the viewing threshold.(Mari has edge-masking to avoid this)

You could use radial symmetry in ZB on multiple axis and try and hack it by rotating the mesh.....but really, for something like a football(hexagonal/pentagonal pattern on a sphere) this could easily be modelled in your 3D program.

demigodssw

musashidan said:

What you're asking isn't possible. Projection painting is view/camera dependent. So as the distance from the camera falls away from perpendicular to parallel the texture projection will eventually 'smear' as it crosses the viewing threshold.(Mari has edge-masking to avoid this)

You could use radial symmetry in ZB on multiple axis and try and hack it by rotating the mesh.....but really, for something like a football(hexagonal/pentagonal pattern on a sphere) this could easily be modelled in your 3D program.

musashidan said:

What you're asking isn't possible. Projection painting is view/camera dependent. So as the distance from the camera falls away from perpendicular to parallel the texture projection will eventually 'smear' as it crosses the viewing threshold.(Mari has edge-masking to avoid this)

You could use radial symmetry in ZB on multiple axis and try and hack it by rotating the mesh.....but really, for something like a football(hexagonal/pentagonal pattern on a sphere) this could easily be modelled in your 3D program.

I wont be painting it manually for eg i will create a fill layer in substance painter and put the pattern on the height map slot so that the pattsrn is applied to the whole mesh
 you're are right about the modeeling it in mesh part but if the scale of the pattern is very amall (example pattern on crysis nano suit) then it becomes very difficult to modwl it on the mesh

musashidan

The nano-suit pattern example would be a tiling texture mapped to the UVs. If you could create a tiling texture of whatever pattern you want to apply then this would work. You would need to have good UVs, plus it might be difficult on a spherical mesh as the seams would be visible.
A character's suit is much easier to tile-map as the seams would be strategically hidden.

This is different from projection painting though, which is view dependent as I mentioned above.

m4dcow

For a high frequency pattern on the ball (Not the stitched patches) a tri planar projection might work.

demigodssw

after lots of googling i cant find any way i asked some guy at my office though and they did something like that by modelling so guess i will have to model 
thank you musas and m4dcow