Has anyone run into a similar problem using the Bumped Specular shader?
Perhaps this is solved in 2.5? I’m exporting the model from Modo, rigging in Maya, and then importing a Maya 2008 ext. 2 mb file.
Aras commented here but never offered a solution.
http://forum.unity3d.com/viewtopic.php?t=10748&start=15
This seems to belong in ShaderLab, moving in 3… 2… 1…
Go into the settings for your model (in Unity), and try turning on “Split tangents across UV seams”.
You can also try toggling “Automatically calculate normals” on and off.
Thank you for your reply Proton, but I’ve tried both before posting, neither have helped to solve the problem.
Specular does not use tangent space, you probably notice that the specular shine is nicer with bumped specular (when it works).
And to get tangent space working, you need to have UVs for your geometry. What does your first UV set look like? If you haven’t started unwrapping, just do a quick UV unwrap and see if it looks any different.
Yep, everything was uv-ed, I had the whole body in one map. I tried to use the shader on another mesh (stock male model that comes with modo) hoping my original mesh had some kind of error. I did a test separating out the head uvs and got a clean result (no spec lines), but got the same lines when the entire body uvs were packed into one sheet :
Looks like when the UVs get too condensed, the shader doesn’t render properly. However, I’d rather just keep everything in one map if possible.
ShaderLab = Questions and answers when writing Unity shaders
I’m not sure it was correct to move this into ShaderLab. I’m not writing a Unity shader, just trying to use one that comes with the engine by default. ? That qualifies as Unity Support to me? Would it be possible to get some kind of response from a Unity developer?
TiA
Usually bumpmapping weirdness are due to tangent space calculation failing in some cases (which most often are caused by very stretched, or mirrored, or non-unique UV mappings).
Generally, you should avoid UV seams, or make them in the areas of the model that are mostly invisible to the viewer.
If you’d file a bug report and attach the model that produces this issue, with textures that you use (prefrably just a Unity project that completely shows the issue), we could take a look at what exactly goes wrong there.
Same problem here, any clue about how this is happening? see my post with reference image for full description http://forum.unity3d.com/viewtopic.php?p=161575#161575
