Im trying to get the alpha channels on a texture and use it as an opacity map (to create grass). I must be doing something wrong though becuase it doesnt seem to be working.
Can anyone help me out?
Can anyone help me out?
How do you get alpha channels to work
- Thread starter Shadow71
- Start date
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If it's a splicit alpha channel (embedded on the texture) you can do that with photoshop. Go to channels, create a new layer and paint it.
How are you currently doing it? Do you have to export it to a certain filetype? (ie. DXT5 texture with alpha channel or whatever)
How are you currently doing it? Do you have to export it to a certain filetype? (ie. DXT5 texture with alpha channel or whatever)
For a targa you may need to use layers to get transparency.. Ive never used targas myself but for a png to have alpha you have to remove the background and set layer(s) so their transparency looks right then "save for web" as 24 bit png.
Or you could save as a DDS and use the actuall alpha channel you made in photoshop (much easier).
Or you could save as a DDS and use the actuall alpha channel you made in photoshop (much easier).
When I try and import a PNG they dont work or even show up in my .utx, and I can't find the option to save it ad a DDS in photoshop.
That's because you need the nVIDIA texture tools plugin for photoshop to do that.
You can find it here.
Then only thing you need is to set up Alpha 1 channel. Black is transparent.
All after how detailed you want it use DXT1,3 and 5. Where DXT1 comes with both 1bit alpha and no alpha. DXT1 is usually enough for masking/transperant parts. DXT3 is for more details and well, I see DXT5 as a little overkill for grass.
You can find it here.
Then only thing you need is to set up Alpha 1 channel. Black is transparent.
All after how detailed you want it use DXT1,3 and 5. Where DXT1 comes with both 1bit alpha and no alpha. DXT1 is usually enough for masking/transperant parts. DXT3 is for more details and well, I see DXT5 as a little overkill for grass.