Black cubes on model

Verewolf

Hello. Someone know how to turn on backface culling or something similiar in Daz 3D? Because I have on model black cubes and this look like deform material on mesh. Or maybe someone know how to delete this issue?

Richard Haseltine

Have you tried rendering? The thing I notice in your screen shot looks like the poor preview of surfaces with less than 100% opacity in Texture Shaded mode.

Verewolf

Yeah, I tried and looks the same, but better, but still have this issue. I know that this look better with back-face culling in Blender, but Daz don't have this option, I searched too how to delete this in mesh, but I don't found anything.

Sven Dullah

Verewolf said:

Yeah, I tried and looks the same, but better, but still have this issue. I know that this look better with back-face culling in Blender, but Daz don't have this option, I searched too how to delete this in mesh, but I don't found anything.

Actually there is an option. Go to preferences/interface, enable back face lighting.

Verewolf

Sven Dullah said:

Verewolf said:

Yeah, I tried and looks the same, but better, but still have this issue. I know that this look better with back-face culling in Blender, but Daz don't have this option, I searched too how to delete this in mesh, but I don't found anything.

Actually there is an option. Go to preferences/interface, enable back face lighting.

Thanks, but I tried this too and still don't work. I know about the new version of Daz Studio. Why they couldn't did "back face culling"?

Sven Dullah

What does it look like untextured?

Verewolf

Sven Dullah said:

What does it look like untextured?

Looks good, but in other program looks as if had holes with cubes. Something like this:

felis

Two things to check:

* Have you checked that normals are aligned?

* Have you tried to apply thickness, maybe resulting in overlapping vertices/faces?

Verewolf

felis said:

Two things to check:

* Have you checked that normals are aligned?

* Have you tried to apply thickness, maybe resulting in overlapping vertices/faces?

You can describe how check this? Because I'm still newbie, unfortunately.

Richard Haseltine

That looks like a geometry issue. Are yiou sure there's only one copy of the item loaded? What item is it?

Verewolf

Richard Haseltine said:

That looks like a geometry issue. Are yiou sure there's only one copy of the item loaded? What item is it?

Yeah. It's just a coat

felis

Verewolf said:

felis said:

Two things to check:

* Have you checked that normals are aligned?

* Have you tried to apply thickness, maybe resulting in overlapping vertices/faces?

 

You can describe how check this? Because I'm still newbie, unfortunately.

I would do it in Blender

* Show normals and check they are all facing same way

* Merge (double) vertices

I would actually expect you can see the same artifacts in Blender.

Verewolf

felis said:

Verewolf said:

felis said:

Two things to check:

* Have you checked that normals are aligned?

* Have you tried to apply thickness, maybe resulting in overlapping vertices/faces?

 

You can describe how check this? Because I'm still newbie, unfortunately.

I would do it in Blender

* Show normals and check they are all facing same way

* Merge (double) vertices

I would actually expect you can see the same artifacts in Blender.

Unfortunately yes, but this is not a difficult because blender have option back face culling, but Daz studio not. So, I don't know how fix this still...

jestmart

If the coat is modeled with a liner it is possible that outer andinner surfaces are to close.  Adding a bit of displacement to the outer surface could fix the problem.

Szark

I  had this with another DAZ3D sold product. I sent a ticket in March and it still hasn't been resolved. I tried to correct it myself in Blender using the suggested methods but that didn't do the job either.

Verewolf

I understand, but maybe someone know how "Make normals Consistent" like in blender? Because maybe is that way to fix this like in blender, in edit mode and click "ctrl + n" or something like this?

Verewolf

jestmart said:

If the coat is modeled with a liner it is possible that outer andinner surfaces are to close.  Adding a bit of displacement to the outer surface could fix the problem.

Unfortunately not

felis

Verewolf said:

I understand, but maybe someone know how "Make normals Consistent" like in blender? Because maybe is that way to fix this like in blender, in edit mode and click "ctrl + n" or something like this?

In Blender select all mesh, and 'Recalculate normals'.

WendyLuvsCatz

If it is a game mesh it likely has levels of detail meshes on top of each other

Bejaymac

That looks a lot like a smoothing group issue.

Verewolf

Bejaymac said:

That looks a lot like a smoothing group issue.

Everything it's okay with smooth, this model just need a back-face culling like in blender or XnaLara

Verewolf

felis said:

Verewolf said:

I understand, but maybe someone know how "Make normals Consistent" like in blender? Because maybe is that way to fix this like in blender, in edit mode and click "ctrl + n" or something like this?

In Blender select all mesh, and 'Recalculate normals'.

I checked this and export model after I did it, but this not working too

JonnyRay

Nvidia Iray does not have backface culling. It isn't a Studio issue, it's not implemented in Iray.

There has to be an issue with the mesh given the screenshots you've shared. Flipped normals, non-manifold geometry (vertices which cross through the mesh), etc. There's something about it that Studio isn't able to resolve and so you're getting the artifacts. Backface culling might be a nice workaround, but the mesh itself must not be clean to be producing these issues.

Verewolf

JonnyRay said:

Nvidia Iray does not have backface culling. It isn't a Studio issue, it's not implemented in Iray.

There has to be an issue with the mesh given the screenshots you've shared. Flipped normals, non-manifold geometry (vertices which cross through the mesh), etc. There's something about it that Studio isn't able to resolve and so you're getting the artifacts. Backface culling might be a nice workaround, but the mesh itself must not be clean to be producing these issues.

So... You have any way to resolve this in Daz?

JonnyRay

You could try a double-sided shader and load the same settings in both sides. But I wouldn't be 100% sure that Studio will still be able to resolve which face needs to receive which surface setting.

• Double-sided Fabric Shader
• Oso Janus Double Sided Shader

Really, the "best" resolution would be to figure out what is wrong with the mesh and fix it there. To suggest how to do that, I'd probably need to see the OBJ file itself.

Verewolf

JonnyRay said:

You could try a double-sided shader and load the same settings in both sides. But I wouldn't be 100% sure that Studio will still be able to resolve which face needs to receive which surface setting.

• Double-sided Fabric Shader
• Oso Janus Double Sided Shader

Really, the "best" resolution would be to figure out what is wrong with the mesh and fix it there. To suggest how to do that, I'd probably need to see the OBJ file itself.

Thanks, but I never use this option, so I don't know how use it exactly

Verewolf

That's what it looks in iray

Szark

is there by any chance Translucency applied to the shader? If so set it to 0 and render it again.

JonnyRay

That last sample image had me thinking the same thing, @Szark.

@Verewolf, put something behind the figure...

• Turn "Draw Dome" on in the Render Settings -> Environment tab.
• Or just put a plane primitive behind them.
• Or use the Backdrop option and put a solid color in the background. 

Transparency with nothing to show through the transparency can be problematic sometimes.