[Frank-95]

Hi all!

Is it possible to create vobs with alpha polygons? Not full alpha, any value between 0 and 255

[Diego93]

It is. I had the problem that a polygon with the semi transparent material had to be present in the world mesh as well or it would not work.

The rest is the same as for other semi transparent materials. Set alpha func and provide a 32 bit tga with alpha channel.

[Frank-95]

Mmm I couldn't make it work. I added one single polygon with the semi alpha texture, and then I applied it to my mesh. The result is that the texture produces full transparent polygons.

These are the texture info (via ImageMagick):

  Format: TGA (Truevision Targa image)
  Class: DirectClass
  Geometry: 200x200+0+0
  Units: Undefined
  Type: PaletteAlpha
  Base type: TrueColorAlpha
  Endianess: Undefined
  Colorspace: sRGB
  Depth: 8-bit
  Channel depth:
    Red: 8-bit
    Green: 8-bit
    Blue: 8-bit
    Alpha: 8-bit
  Channel statistics:
    Pixels: 40000
    Red:
      min: 125 (0.490196)
      max: 125 (0.490196)
      mean: 125 (0.490196)
      standard deviation: 0 (0)
      kurtosis: 0
      skewness: 0
      entropy: -1.#IND
    Green:
      min: 32 (0.12549)
      max: 32 (0.12549)
      mean: 32 (0.12549)
      standard deviation: 0 (0)
      kurtosis: 0
      skewness: 0
      entropy: -1.#IND
    Blue:
      min: 32 (0.12549)
      max: 32 (0.12549)
      mean: 32 (0.12549)
      standard deviation: 0 (0)
      kurtosis: 0
      skewness: 0
      entropy: -1.#IND
    Alpha:
      min: 141 (0.552941)
      max: 141 (0.552941)
      mean: 141 (0.552941)
      standard deviation: 0 (0)
      kurtosis: 0
      skewness: 0
      entropy: -1.#IND
  Image statistics:
    Overall:
      min: 32 (0.12549)
      max: 141 (0.552941)
      mean: 82.5 (0.323529)
      standard deviation: 0 (0)
      kurtosis: 0
      skewness: 0
      entropy: 0
  Colors: 1
  Histogram:
     40000: (125, 32, 32,141) #7D20208D srgba(125,32,32,0.552941)
  Rendering intent: Perceptual
  Gamma: 0.454545
  Chromaticity:
    red primary: (0.64,0.33)
    green primary: (0.3,0.6)
    blue primary: (0.15,0.06)
    white point: (0.3127,0.329)
  Alpha color: grey74
  Background color: white
  Border color: srgb(223,223,223)
  Transparent color: none
  Interlace: None
  Intensity: Undefined
  Compose: Over
  Page geometry: 200x200+0+0
  Dispose: Undefined
  Iterations: 0
  Compression: None
  Orientation: Undefined
  Properties:
    date:create: 2017-06-18T11:26:26+02:00
    date:modify: 2017-06-18T11:27:20+02:00
    signature: 5c3fe2b3b88329b18d7ae9db6dc863e0db3eefcf8cc56230d3ff1eb585eda6b1
  Artifacts:
    tga:image-origin: TopLeft
    verbose: true
  Tainted: False
  Filesize: 160KB
  Number pixels: 40K
  Pixels per second: 1.481MB
  User time: 0.016u
  Elapsed time: 0:01.027
  Version: ImageMagick 7.0.3-0 Q16 x64 2016-09-05 http://www.imagemagick.org

Does alpha channel seem to be okay to you? It seems so to me

As regards the mesh, I ensured that the semi alpha was visible in the render view, but then I noted that after export and re-import, in the render view the texture was full opaque again. Perhaps krximpexp is not able to export alpha?

[Diego93]

Does alpha channel seem to be okay to you? It seems so to me

Yes I think it looks alright.

Perhaps krximpexp is not able to export alpha?

Kerrax does only export the material name and the diffuse texture name from what I know. How it is rendered and which texture is used does not depend on the exporter.

The most important thing is that you set up the material filter correctly. Let me write down all steps needed.
1. Export your 32-bit file with alpha channel.
2. Put it inside your gothic texture directory
3. Open your world mesh in 3D Software and add the texture to at least one polygon, preferrably one that won't be seen in the game
4. Import that mesh in spacer and check material filter "trash". The new material/texture should be listed.
5. Move this new material to another materialfilter and set it's alphafunc to "blend"
6. Exit spacer and save the material filter
7. This polygon should be semi transparent (255 possible steps from visible to invisible) in game. If it does:
8. Add the texture to the vob in 3D Software and export it.
9. Ensure that if you open the vob as world mesh in spacer, the material is applied correctly and does look semi transparent.
10. Delete all compiled files of the vob
11. It will look wrong in spacer, but in game the vob should have a semi transparent look.

At least this worked for me. Hope it will for you.

[Frank-95]

5. Move this new material to another materialfilter and set it's alphafunc to "blend"
6. Exit spacer and save the material filter

Thank you! I missed that part, it works now!

[Frank-95]

Okay I hadn't tested it in game, it only worked more or less in the spacer.

I added the polygon and set the material:

[% zCMaterial 39939 4]
    name=string:SEMIALPHA_BROWN
    matGroup=enum:0
    color=color:125 32 32 255
    smoothAngle=float:60
    texture=string:BROWN_SEMIALPHA.TGA
    texScale=string:128 128
    texAniFPS=float:0
    texAniMapMode=enum:0
    texAniMapDir=string:0 0
    noCollDet=bool:0
    noLightmap=bool:0
    lodDontCollapse=bool:0
    detailObject=string:
    detailObjectScale=float:1
    forceOccluder=bool:0
    environmentalMapping=bool:0
    environmentalMappingStrength=float:1
    waveMode=enum:0
    waveSpeed=enum:2
    waveMaxAmplitude=float:30
    waveGridSize=float:100
    ignoreSunLight=bool:0
    alphaFunc=enum:2
    defaultMapping=rawFloat:2.34375 2.34375 
[]

The mesh material has the same name and in fact I can see the trasparent texture in the spacer, flickering though. I mean it isn't still, but appears and disappears as I move the camera.

In game I see it fully opaque though. This is the mesh whose base is the lantern by mud.freak

semialpha.7z