[ricardo]

I don't think I can help, but nice model mate!

Ricardo

[lebbeus]

Doesn't pure white kick the clip map feature on? Is this your problem or am I misunderstanding?

[SunlightRocker]

If parts of your model appear transparent in alpha when they should not, then you have a problem and you are right there's a bug.
Sorry I did not get that

It ok.

I don't think I can help, but nice model mate!

Ricardo

Thanks alot, but its actually not my model. Its for a company and its theres CAD-model, and its heavy as F*CK. Hate it.

Doesn't pure white kick the clip map feature on? Is this your problem or am I misunderstanding?

I did´nt understand you...
Since my model dont have any transparent parts, my alpha-image should be just black and white. (rgb 0,0,0 & rgb 255,255,255)

[lebbeus]

it's my fault, don't worry

I thought that was a map that you created to use on the model, not one that MW created as part of the render…pay no attention to my previous comment

[SunlightRocker]

it's my fault, don't worry

I thought that was a map that you created to use on the model, not one that MW created as part of the render…pay no attention to my previous comment

hehe okey. Its Ok.

NL, is this a known bug? Any comments?

[ivox3]

So sad this alpha thing ....

http://img242.imageshack.us/img242/2095/anwio9.jpg

[Mihai]

It can be an issue with alpha and certain materials....alpha has worked fine for me so far. Could you post the settings of one of the materials that's showing transparency in the alpha?

Regarding the alpha and Photoshop, you have to trim it a little. There's a feature in Layer>Matte>Remove black matte, or white matte. That will make it match better. Just load the alpha as a selection, copy paste in a new layer your image, and run that command.

[Jozvex]

Maybe the normals of the object are inverted and that affects the alpha?

[SunlightRocker]

So sad this alpha thing ....

http://img242.imageshack.us/img242/2095/anwio9.jpg

hehe, thats funny.

It can be an issue with alpha and certain materials....alpha has worked fine for me so far. Could you post the settings of one of the materials that's showing transparency in the alpha?

Heres the settings for the main-body-material:



I found out that the alpha has lots of more transparencyinformation than it first appear. I lowered the brightness and raised the contrast in Photoshop and got this. Its like X-ray:

[Pierre Caron]

I may be wrong but I think that a transmittance color other than black gives transparency to your material and lighter it is and more transparent it is.
Try to render with transmittance color set to black to see what happens to your alpha image.
Pierre

[Fernando Tella]

Yes, it's odd cause the render doesn't seem to be transparent, but those materials do have transparency (the white transmittance). It has very low attenuation though, which leads to check the scale. Just a guess.

[SunlightRocker]

Ohh, sorry. The image of the material was showing the second BSDF twice. Updated now...
Its pure black in the transittance on the first BSDF, so there should´nt be any transperancy.

[arch4d]

Its pure black in the transittance on the first BSDF, so there should´nt be any transperancy.

sorry, but you´re wrong...
if you have a transmittance color different to black on any bsdf layer of a material, the mat has a transparency...

[SunlightRocker]

Its pure black in the transittance on the first BSDF, so there should´nt be any transperancy.

sorry, but you´re wrong...
if you have a transmittance color different to black on any bsdf layer of a material, the mat has a transparency...

Okey, your probably right. Im no master. It makes sence now when you say it.

EDIT After a few moments of thinking.

Then Im making my materials the wrong way... Should I use a coating instead of a second BSDF to get reflectance?

[Mihai]

No use two bsdfs like you did, but leave the transmittance at black for both of them, and also set the blending mode to Additive mode. Check the manual for Additive vs Normal mode. The order of the bsdfs doesn't matter.