Opacity Map help Please

longhornfan25

So i'm having trouble with the opacity maps in the alpha channel in my diffuse texture. There not showing up in Udk,and I know i;m doing something wrong but i just dont know what it is. Heres what i do.

heres the alpha in my diffuse



then i bring in the diffuse into UDK with these settings (this is where i think i mess up)




Then i connect it like this



So what am i doing wrong??

Thanks, Michael

cholden

Set the material Blend Mode to BLEND_Translucent or BLEND_Masked depending on whether you want to use the alpha as Opacity or Opacity Mask.

longhornfan25

Whats the difference between Opacity and Opacity mask?


Thanks for your reply

cholden

Opacity gives accurate 0-100 opacity levels. Good for semi-transparent things. Gives a softer, smoother transition, but is more expensive.

Mask reduces the alpha to 1-bit information. So it's either there or it isn't. This result is cheaper, but can appear more jagged if sloppy. Great for vegetation.

longhornfan25

O okay, Thank you very much for your help

longhornfan25

one extra question when i make it BLEND_Translucent, do i still have both of those things checked off (alpha to opacity) and (alpha to opacity mask )?????

Oniram

generally you dont need to have those checked off at all.. thats just to tell the material that you want the alpha channel going to those nodes.

but regardless, with BLEND_Translucent, you only use Opacity. with BLEND_Masked, you only use the opacity mask.

longhornfan25

thanks oniram

longhornfan25

tried it didnt seem to work

Oniram

just to double check.. did you save that image out as a 32 bit targa?

longhornfan25

Yes i did, should i have not?

Oniram

no u should have. 32 bit preserves the alpha. just making sure. try taking the alpha of your diffuse and putting that and only that into the emissive slot. all other slots empty, if it shows up and it is there at least.

longhornfan25

okay, thank you for all your help