Making Background Transparent

[Soulreaver]

I have a texture and its background color components are 151,151,151.There is a circular blur object at middle of texture.
If i choose the back color black there is no problem.But my objects color is also black.

Is there any way to getting my object without back color? Thanks...

[nexusone]

Yes, you can use the Alpha channel for transparentcy.
The transparentcy is based on Alpha values not color. Alpha = 1 non-transparent, 0= transparent, 0.5 simi-transparent.

Now if you use the TGA file format, it supports Alpha channel and you can create a transparentcy mask with the Alpha channel.

With BMP's you would need two files one for texture and one for alpha mask.

Hope this helps.

Originally posted by Soulreaver:
I have a texture and its background color components are 151,151,151.There is a circular blur object at middle of texture.
If i choose the back color black there is no problem.But my objects color is also black.

Is there any way to getting my object without back color? Thanks...

[Soulreaver]

Thanks a lot.