[2D] How do most people make levels with proper collision AND textures?

you can modify the collider size without changing the object's size. just use "Edit Collider" button in inspector

Could you at least put a picture of the problem?

So I found and slightly edited a script that makes the textures tile by creating instances of the material in the editor as I scale the prefab. This seems to work well, but comes up with an error saying

"Instantiating material due to calling renderer.material during edit mode. This will leak materials into the scene. You most likely want to use renderer.shared$$anonymous$$aterial ins$$anonymous$$d."

The script calls "Resources.UnloadUnusedAssets();" after every time it assigns a new instance of the material, will this still cause a memory leak? Or is it fine? Who knows, but I'm using it until Unity releases a tile editor.

Code was found here, and here it is:

 using UnityEngine;
 using System.Collections;
 
 [ExecuteInEdit$$anonymous$$ode]
 public class TextureTilingController : $$anonymous$$onoBehaviour {
     
     // Give us the texture so that we can scale proportianally the width according to the height variable below
     // We will grab it from the meshRenderer
     public Texture texture;
     public float textureTo$$anonymous$$eshY = 2f; // Use this to contrain texture to a certain size
     
     Vector3 prevScale = Vector3.one;
     float prevTextureTo$$anonymous$$eshY = -1f;
     
     // Use this for initialization
     void Start () {
         this.prevScale = gameObject.transform.lossyScale;
         this.prevTextureTo$$anonymous$$eshY = this.textureTo$$anonymous$$eshY;
         
         //this.UpdateTiling();
     }
     
     // Update is called once per frame
     void Update () {
         // If something has changed
         if(gameObject.transform.lossyScale != prevScale || !$$anonymous$$athf.Approximately(this.textureTo$$anonymous$$eshY, prevTextureTo$$anonymous$$eshY))
             this.UpdateTiling();
         
         // $$anonymous$$aintain previous state variables
         this.prevScale = gameObject.transform.lossyScale;
         this.prevTextureTo$$anonymous$$eshY = this.textureTo$$anonymous$$eshY;
     }
     
     [Context$$anonymous$$enu("UpdateTiling")]
     void UpdateTiling()
     {
         // A Unity plane is 10 units x 10 units
         float planeSizeX = 10f;
         float planeSizeY = 10f;
         
         // Figure out texture-to-mesh width based on user set texture-to-mesh height
         float textureTo$$anonymous$$eshX = ((float)this.texture.width/this.texture.height)*this.textureTo$$anonymous$$eshY;
         
         gameObject.GetComponent<Renderer>().material.mainTextureScale = new Vector2(planeSizeX*gameObject.transform.lossyScale.x/textureTo$$anonymous$$eshX, planeSizeY*gameObject.transform.lossyScale.y/textureTo$$anonymous$$eshY);
         Resources.UnloadUnusedAssets();
     }
 }