Attempting to render 3D shapes

[Gunderak]

Hey, tried playing around rendering a hollow cylinder, sort of worked.
Here is my script:

PHP Code:

//#CLIENTSIDE
function onCreated(){
  const radius = 200; //The radius of the cylinder.
  const detail = 2; //How much detail to show.
  const ntsc = false; //NTSC colours, sort of.
  const blurlevel = 1; //To skew the render.
  const spinspeed = 0.05; //How fast it rotates.
  DrawGUI();
}
function DrawGUI(){
  this.imgs = 0;
  temp.tx = screenwidth/2 - 250;
  temp.ty = screenheight/2 + 50;
  //Loops through and shows all polygons for the render.
  for(temp.i = 0; i < radius*detail; i ++){
    this.imgs.add(i);
    temp.tx += sin(i)*radius; //Changes the positioning to a circle.
    temp.ty -= cos(i)*radius; //Same
    with(findimg(1+i)){
      layer = 4;
      polygon = {
        temp.tx, temp.ty,
        temp.tx + radius/2,
        temp.ty + radius/2,
      };
      useowncenter = true;
      rotationcenter = {temp.tx -radius/2, temp.ty -radius/2};
    }
  }
  onTimeout();
}
function onTimeout(){
  //Loops through all images and rotates them.
  for(temp.i : this.imgs){
    findimg(1+this.imgs[i]).rotation += spinspeed;
    if(ntsc){
      findimg(1+this.imgs[i]).red = random(0,1);
      findimg(1+this.imgs[i]).green = random(0,1);
      findimg(1+this.imgs[i]).blue = random(0,1);
    }
    //Skews the polygons.
    findimg(1+this.imgs[i]).stretchx = random(1,blurlevel);
    findimg(1+this.imgs[i]).stretchy = random(1,blurlevel);
  }
  settimer(0.05);
} 


The script can cause the Graal client to become quite laggy if rendering a large cylinder with a high detail value.
Not quite sure how to actually make the shape proper 3D.
In which I could rotate it on each axis, x,y,z.
If anyone has some formulas they'd like to share it's more than welcome.