I am creating a 3D game engine in java and I am having problems with my texturing. I get these weird artifacts:image of game with bad texture. (I’ll make a separate post to figure out why the game isn’t filling the entire screen, unless y’all got a quick fix. my main issue that I want to address right now is the texture) I’ve been trying to fix it on my own for a few days now and am now turning to y’all for help. here is my render3D class:

package com.base.Engine.Texture;

import com.base.Engine.Game;

public class Render3D extends Render {

    public double[] zBuffer;
    private double renderDistance = 50000;

    public Render3D(int width, int height) {
        super(width, height);
        // TODO Auto-generated constructor stub

        zBuffer = new double[width * height];


    }
    /*
     * ===========================================================================
     * | Future goal is to move all the movement values into their own classes in|
     * | com.base.engine.Player.Controls                                         |
     * ===========================================================================
     */



    public void floor(Game game) //and ceiling
    {
        //RotationEngine re = new RotationEngine(game);
        //re.rotation = game.time / 100.0;
        //MovementEngine me = new MovementEngine(game);

        double floorPos = 15;
        double ceilPos = 15;
        double FB = game.control.z; // forward and backwards
        double LR = game.control.x; // left and Right


        double rotation = game.control.rotation;
        double cosine = Math.cos(rotation);
        double sine = Math.sin(rotation);

        for ( int y = 0; y < height; y++ )
        {
            double yDepth = (y - height / 2.0) / height; //yDepth is sky

            double z = floorPos / yDepth; // this can move the floor up and down

            if (yDepth < 0)
            {
                z = ceilPos / -yDepth; // makes the ceiling move the same direction as the floor & the int in there changes ceiling height
            }



            for ( int x = 0; x < width; x++ )
            {
                double xDepth = ((x - width / 2.0)) / height;
                xDepth *= z;
                double xx = xDepth * cosine + z * sine;/* adding numbers here will make the "player" go to the right and vice versa */
                double yy = z * cosine - xDepth * sine; /* "+,-" moves forward and backwards */

                //double xx = xDepth * re.cosine + z * re.sine;/* adding numbers here will make the "player" go to the right and vice versa */
                //double yy = z * re.cosine - xDepth * re.sine; /* "+,-" moves forward and backwards */
                int xPix = (int) (xx + LR);
                int yPix = (int) (yy + FB);
                //int xPix = (int) (xx + me.LR);
                //int yPix = (int) (yy + me.FB);
                //zBuffer[x + y * width] = z;
                //pixels[ x + y * width] = texture.floor.pixels[(xPix & 10) + (yPix & 10) * 626];
                pixels[ x + y * width] = texture.floor.pixels[(xPix & 7) + (yPix & 7) * 8];
                //pixels[ x + y * width] = ( (xPix & 10) * 15) | ( (yPix & 10) * 15)  << 8;


                if ( z > 200 ) {
                    pixels[x + y * width] = 0;
                }
            }
        }
    }

    public void renderDistanceLimiter() {
        for ( int i = 0; i < width* height; i++ )
        {
            int color = pixels[i];
            int brightness = (int) (renderDistance / (zBuffer[i]));

            if (brightness < 0)
            {
                brightness = 0;
            }
            if (brightness > 255)
            {
                brightness = 255;
            }

            int r = (color >> 16) & 0xff;
            int g = (color >> 8) & 0xff;
            int b = (color) & 0xff;

            r = r * brightness / 255;
            g = g * brightness / 255;
            b = b * brightness / 255;

            pixels[i] = r << 16 | g << 8 | b;
        }
    }
}

Im making this from scratch without Java3D or any other things like that.

Ive tried changing every variable I believe is connected to the problem but I only ended up making it worse. Im a novice programmer and can’t figure it out on my own. The code is supposed to create an endless walkway and ceiling, using the same texture because I haven’t gotten far enough to create a separate sky texture. This is what the texture looks like: light blue square with a darker blue outline