Alpha sorting problem.....but no alpha textures?

[OzwellWayfarer]

I have just run into a strange issue that hopefully someone can assist with. I have been texturing some meshes this evening and for some reason, my perfectly normal texture is experiencing the "alpha sorting" issue, where the object is slightly transparent when viewed from ceritan angles.

 

Now, I went over to Opensim to check this out and the exact same meshes and the exact same texture do not experience this issue there. I double and tripple checked the texture in GIMP and there is 1000% no alpha on the texture.

The pieces do have normal maps applied but again, also in opensim. In OS my objects look solid, in SL they dont. I am also pretty sure it has nothing to do with the meshes, as this is a re-texture job and the meshes were fine up intil the point I applied the texturte.

So, whats going on? Its not the mesh, and its not the texture.......Help please! Thank you. :)

[Drongle McMahon]

"1000% no alpha"

If there is an alpha cnannel, then perhaps you may get the alpha glitch even if all the pixels are completely opaque. If that's the case, open in Gimp, Remove the alpha channel (Layers menu), and re-export. Alternatively, save in a non-alpha format, such as bmp. See if that makes the difference. I am guessing, but perhaps the other grid removes the alpha channel if it's completely opaque?

[arton Rotaru]

You can easily check if the diffuse texture map actually has an alpha channel, or not in-world. If it hasn't an alpha channel, the Alpha mode drop down menu is greyed out, in the build floaters texture tab.

[OzwellWayfarer]

Yes I can confirm that the drop down is greyed out, however I notice that when I select the face, you see the wireframe in the way that mesh with alpha maps is normally shown.

 

 

[OzwellWayfarer]

I tried converting it over to bmp and back to png and that seems to have got it! Not sure what was going on exactly but you cracked it. Thank you!

 

EDIT - spoke too soon. It just seems to have changed the angle the glitch is visible from. Doh!

[arton Rotaru]

You have to select the face with the texture in question.

However, perhaps you are running into this issue described here? https://jira.secondlife.com/browse/BUG-5847

But it has to meet a few conditions, to get that.

[OzwellWayfarer]

ok. switching the files, then trashing the meshes that were effected and rezzing new ones seems to have solved the issue. I still have no idea what was going on though. Thanks to you both for your help.