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Hi i'm trying to make texture transparent and gl_FragColor = vec4(pixel.r,pixel.g,pixel.b,0.2) wont do the trick. Tried to do this with color but it just wont make it transparent. I'm using .png image and it has no transparent parts. Is it possible to make it partly transparent by shader? Please advice

Hi, i have this shader and i want texture to scroll x direction, but something is wrong and texture wont move. I'm new to shaders, please help

VERT:
attribute vec3 Vertex;
attribute vec2 TexCoord0;

varying vec2 TexCoord; 

uniform mat4 TextureMatrix[8];
uniform mat4 ModelViewMatrix;
uniform mat4 ProjModelViewMatrix;

void main(void)
{ 
    TexCoord = vec2(TextureMatrix[0] * vec4(TexCoord0, 1.0,1.0)); 
   
    gl_Position = ProjModelViewMatrix * vec4(Vertex,1.0); 
} 

FRAG:

uniform sampler2D Texture[8];

uniform float Time; 
varying vec2 TexCoord; 

void main(void) { 
    vec4 texel = texture2D(Texture[0], vec2(TexCoord.x + 100.0, TexCoord.y)); 
    //vec4 texel = texture(Texture[0], vec2(TexCoord.x + Time,0.0)); 

    gl_FragColor = texel;
    //gl_FragColor=vec4(1.0,1.0,1.0,1.0);
}   

I have time implemented in behaviour dll and its set to <time+=0.1>. But for some reason it doesnt scroll the texture. Setting 0.5f instead of time scrolls the texture. This is my dll code:

.......
void MyBehavior::update(void)
{
    MEngine * engine = MEngine::getInstance();

    MRenderingContext *render = engine->getRenderingContext();

    MGame * game = engine->getGame();

    MLevel * level = engine->getLevel();

    MScene * scene = level->getCurrentScene();

    MOEntity* entity = scene->getEntityByName("Entity0");

    MMesh * mesh = entity->getMesh();

    // check if the game is running, removing thif test will enable In-Editor update (like for the lookAt behavior)
    if(! game->isRunning())
        return;

    // get the associated parent object (who is using this behavior)
    MObject3d * parent = getParentObject();

    // lets rotate the parent object around the z axis, using our custom "rotationSpeed" variable
    //parent->addAxisAngleRotation(MVector3(0, 0, 1), m_rotationSpeed);
    if (time > 1.0)
    {
        time = 0.0;
    }
    else
    {
        time += 0.1;
    }

    MMaterial * material = mesh->getMaterial(0);
    if (material)
    {
        MFXRef * FXRef = material->getFXRef();
        if (FXRef)
        {
            unsigned int fxId = FXRef->getFXId();
            render->bindFX(fxId);

            // send uniform variable
            render->sendUniformFloat(fxId, "Time", &time);

            render->bindFX(0);
        }
    }
}
........

Hi. Is it possible by some way to pass variable to shader by script? For examle time.