Regarding displacement SubD & regular SubD

ioonrxoon

So how do [displacement SubD and regular SubD] these 2 play together exactly?

I remember reading somewhere that displacement subD overrides the regular subD. Is that true?

If so, how does it work exactly on items with multple surfaces? Could I put an item at subD 3, for example, and have only select surfaces at subD 5 with displacement? Or will putting subD 5 on a surface turn the enitre object to subD 5?

Richard Haseltine

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The actual level of divisions on an object will be the maximum of the object level Render SubD and all the displacement divisions on its surfaces, the minimum will be the render level (hence its label). The difference is that the object-level settings applies actual SubD, with the shape chnaging to smooth the model, while the surface settings, if they add any more levels, divide the mesh without applying any smoothing.

ioonrxoon

I see, so the only reason to use surface subD is if you want to keep straight edges and still get fine detail from the displacement map. Thanks.

One more thing, if the render subD is at 3 for example, and the displacement at 1, will the displacement take advatage of the render subD, or do I have to crank it up as well?

Richard Haseltine

ioonrxoon said:

I see, so the only reason to use surface subD is if you want to keep straight edges and still get fine detail from the displacement map. Thanks.

One more thing, if the render subD is at 3 for example, and the displacement at 1, will the displacement take advatage of the render subD, or do I have to crank it up as well?

Displacement will take advantage of any division, so no if the surface setting is 1 it is irrelevant on anything wit at least one level of SubD applied.

lilweep

Say you have a model with 10 dfferent surfaces with all SubD set to 1, except 1 of those surfaces has Surface Displacement SubD = 5, does that mean whole object has SubD 5 as a result of that one surface?  Or it's just the geometry of the surface part that gets Subdivided?

Frinkky

lilweep said:

Say you have a model with 10 dfferent surfaces with all SubD set to 1, except 1 of those surfaces has Surface Displacement SubD = 5, does that mean whole object has SubD 5 as a result of that one surface?  Or it's just the geometry of the surface part that gets Subdivided?

It appears the whole figure is subdivided (according to here: https://www.daz3d.com/forums/discussion/comment/8078326).