ZBrushCentral

Why is this happening? (pics included)

ZBrush Usage Questions
#1

I am using 3ds Max 9 and 2008 (problems exist with both), I have created my models in Max and UV unwrapped them (no overlapping seams, quad like polygons etc)

    I am following the 'Zbrush to 3DsMax - Zinfo' found on the web
    
    [http://www.zbrush.info/docs/index.php/ZBrush_to_3ds_Max](http://www.zbrush.info/docs/index.php/ZBrush_to_3ds_Max)
    
    The problem I have are present with both UV mapping in Max and the AUV, GUV tiling within zbrush (after re-importing OBJ of course)
    
    The problems also both happen when using a stored morph target and generating the Dis. Map from that, and secondly allowing Zbrush to change the lower sub-d levels upon dividing geometry and then generating the Dis.Map from that, then Re-importing the changed OBJ back into Max
    
    Below are two images from 3ds Max 9 renderer, using the Mental Ray displacement. The strange thing is that the displacement seems to be affected by the turbosmooth I place on my OBJ. 
    You can see the non-smoothed polygons under the Displacement itself. 
  
  There are two images, the first with Turbosmooth Iterations 1, the 2nd with Iterations 2

You can see the difference between the two :
    As the one with Iterations 2 have more unsmoothed polys due to it being subdivided again


    
    
    I know you need to put a turbosmooth on the OBJ but why is the displacement being affected by the iterations on the Turbosmooth itself?

Attachments

Turb1DIS.jpg

Turb2DIS.jpg

#2

hey! try not to use DPSubPix settings…just leave it at 0 (zero).

may be that’ll help! Luck!

P.S> keep trying, keep on tweaking the settings…and ull find YOUR best way of Disp Render! :lol:

#3

I do use adaptive and not use DSubix, also smooth UVs

If anyone else can help It would be greatly appreciated, meanwhile I gonna install Max 8, see if it works on that

#4

I dont understnad this its still doing it

Attachments

goblin.jpg

#5

bumpity bump

#6

you don’t need to place a turbosmooth on the object at all
in the mental ray settings, find the number of render subdivisions and up that.

#7

If i dont put TSmooth on, I get this

Attachments

notgood.jpg

#8

Well high-frequency detail works fine

Attachments

Ok.jpg

#9

But when I start blocking thing s in with low frequency detail I get this

Attachments

doh.jpg

#10

hey there.

it looks like its bumping a tesellated version of your geometry.

did you export your OBJ from MAx to ZBrush with a turbosmooth in the stack?

#11

hey thanks for the reply

eerrrm I dont think so, I will try it again
however the UNwrap modifier was still in the stack when I exported it to Zbrush

Also when i up the iterations on the TSmooth after applying the Dis.Map the increased tesselation shows up in the final render

#12

heya,

try exporting it with nothing in the stack and let us know how it goes :slight_smile:

best of luck!

#13

yeah its still doing it, Tried it with nothing in the stack,

It seems like it would be quite a common problem but nobody seems to have had the same problem before

the Dis. Map has to be in RGB also yes?

I also tried the 16-bit maps and still the same problem, with Smooth Uv on and off

Also Dsubpix and Adaptive modes

Again I have followed the exact settings in the zbrushto3dsmax.pdf and lots of variations

#14

howdy,

Just to check when you re-import your obj into max, you did convert it to an editable poly object right?

#15

yes I converted to a edit-poly from an edit-mesh before i add the TSmooth and Dis.Map

I also tried changing the various settings within the Renderer under Shadows & and Displacement (i.e changed soft to segments)

Also tried changing the texture filtering in the Material browser

obviously when i render the model without applying the Dis.Map the tesselation isnt there

and when I apply the Dis. Map, its there again

It happens to all my OBJ’s and only where I have displaced the mesh, In other words the tesselation doesnt show up where I havent added detail