CSG with material that has transparency on it

[Rick]

Is it possible to have a texture with transparent spots, have that transparency be applied when painted onto a CSG model? I have this situation, make a lightmapped material for it, but it on the model and the transparent parts show up as white. Any ideas?

[shadmar]

In mat editor, select BlendMode : Alpha

Works for me on csg geometry using alpha material.

 

[Pancakes]

Let's just make an "Ask shadmar" thread

[Rick]

Once again shadmar you come to the rescue! Thanks!

[Rick]

Any ideas on just a box I made:

 

self.buttonMaterial = Material:Load("UI/round_button.mat")
self.button = Model:Box()
self.button:SetScale(1, 1, .1)
self.button:SetPosition(0, 0, 1.54)
self.button:SetMaterial(self.buttonMaterial)

 

The same material has black for transparency on a Model:Box()

[shadmar]

Strange... put before setmaterial :

self.buttonMaterial:SetBlendMode(1)

change anything? I don't know really.

[Rick]

no dice.

[Andy Gilbert]

Hi rick, when you say the texture has black for transparency, are you meaning that's what's happenng as apposed to being transparent or the areas black are what you want transparent?

 

As far as I'm aware the transparency is picked up from the alpha channel of the image (not black areas)

 

Also shouldn't you have z-sort checked for transparent mats?

 

Andy

[Rick]

So this is working on PC. On mobile the cube is just all white. No texture at all

[ChrisV]

So this is working on PC. On mobile the cube is just all white. No texture at all

This is just a wild guess, but is your texture by any change non power of two, or square, Rick? I remember having the same kinda 'white texture' issue a while back when I was developing a game with a good friend of mine. Best to keep your textures powers of two (64x64, 128x128, 256x256, 512x512, etc...) and in some cases even not rectangular. Depends on the device, I think.

[Rick]

*sigh* this is frustrating. When I made it 256x256 I see it on PC but I can't see the cube at all on mobile. It's there, because picking works on it, but just can't see it

 

The strange thing is now, I resized the image back to 300x300 just to test, but when I import into LE3 it says it's 256x256 still. Not sure if LE is resizing it to nearest power of 2 or what.

[Rick]

lol now when I Run on mobile I get error: Error: Failed To Load file "C:/Leadwerks/Projects/MyWhackyMoles/Projects/Android/libs/armeabi/sta93584".

 

 

but now I see the mesh and the right transparent texture. wtf lol

 

 

Thanks Chris!

[lukhns]

Is there any fix for this? I am having the same issue but on a model. The texture is 512*512 and contains transparency, material blend mode is set to alpha and appears fine in the 'viewer' but not in the engine.

 

[shadmar]

There isn't really any foilage shaders yet but by modifying an exiting one

you can do an alphatest by adding this right below outcolor * = texture2d...

if (outcolor.a<0.5) discard;

[lukhns]

There isn't really any foilage shaders yet but by modifying an exiting one

you can do an alphatest by adding this right below outcolor * = texture2d...

if (outcolor.a<0.5) discard;

 

This will work fine for now. Thanks