Muchas grazias

wonderfull

haha

thank you

:=)

see the part where you did:
glColorMask(FALSE, FALSE, FALSE, TRUE);

I'm pretty sure that means you don't want the color information, only the alpha.

so you probably want to use this instead:
glColorMask(TRUE, TRUE, TRUE, TRUE);

hello,
1- i try to render a colored sprite with alpha on a texture : using :
//----------------------------------------------
-(void)renderMe
{
CGSize s = [[CCDirector sharedDirector] winSize];
renderTarget = [CCRenderTexture renderTextureWithWidth:320 height:480];
[renderTarget setPosition:ccp(s.width/2, s.height/2)];

[self addChild:renderTarget z:2];

brush = [[CCSprite spriteWithFile:@"coloredSpriteAlpha.png"] retain];
[brush setBlendFunc: (ccBlendFunc) { GL_ZERO,GL_ONE_MINUS_SRC_ALPHA }];
}
//---------------------------------------------
2- then in my time loop i use this

-(void) tick:(ccTime)dt
{
[renderTarget clear:0 g:0 b:0 a:255];
[renderTarget begin];
glColorMask(FALSE, FALSE, FALSE, TRUE);
[brush setPosition:ccp(240,160)];
[brush visit];
glColorMask(TRUE, TRUE, TRUE, FALSE);
[renderTarget end];
}

//---------------------------------------------

3- the result : i got an alpha effect of my sprite and i can see under the texture

4- but what i want is to show the sprite with its color rendered into this texture surface.

5- any help ??

thank you

:=)