Alpha Channel Problem
Blitz3D Forums/Blitz3D Programming/Alpha Channel Problem
| ||
| I am showing sprites on the screen with Alpha Channels, but the sprite shows a horizontal band at the top of it, as if it doesn't see the alpha channel on the first line. Has anyone else experienced this and is there a way around it? |
| ||
| Could it be wrapping the texture, and picking up the colour off the bottom of the texture? Often UV co-ordinates overlap the top of the texture map. Try giving the sprite a couple of pixels transparent alpha border to avoid this. |
| ||
| Don't worry, I fixed it myself. The answer was to clamp down the uv textures thus: spritetexture=LoadTexture(file$,50) where the 50 means: 2 - Alpha Channel 16 - Clamp Down U 32 - Clamp Down V It was wrapping the texture around. The horizontal line was coming from the bottom of my texture and wrapping round to the top. |
| ||
| Ah, I wasn't aware of UV Clamping! I'll have to look into that. Thanks for posting your solution! |
   |