Best way to create a 3D UI

Unity Engine
1

To create a 3D UI, you need to have a world space UI since a normal one will not use a perspective camera, any ideas on how to either a. have it scale to fit screen sizes perfectly, or b. an alternate method for 3D UI.

The current UI I have looks nice in the editor, but once the screen size changes, it does not fit the screen nicely like the usual Overlay UI.

2

Solved by scaling along the X axis of the canvas to match the aspect ratio, the Y axis seems to never need changing

/// <summary>
    /// Scales the current object with the aspect ratio on awake
    /// </summary>
    public class ScaleWithAspectRatio : MonoBehaviour {
       
        #region PUBLIC_VARIABLES

        /// <summary>
        /// The aspect ratio used in design, this is the calculated ratio (ie. 16:10 = 16/10 = 1.6)
        /// </summary>
        [Tooltip("The aspect ratio used in design, this is the calculated ratio (ie. 16:10 = 16/10 = 1.6)")]
        [SerializeField] private float designRatio = 1.6f;

        #endregion // PUBLIC_VARIABLES

        #region MONOBEHAVIOUR_METHODS

        /// <summary>
        /// Awake this component
        /// </summary>
        void Awake () {
            float screenRatio = (float) Screen.width / (float) Screen.height;
            float newXScale = transform.localScale.x / designRatio * screenRatio;

            transform.localScale = new Vector3(newXScale, transform.localScale.y, transform.localScale.z);
        }

        #endregion // MONOBEHAVIOUR_METHODS
    }
3

using a screen space camera canvas will use whatever camera you specify, so if its perspective it will use that.

4

Thanks fill, that will save me having a second camera. Problem was though when I tested the screen space camera it was scale with screen size to match the width which was affecting the scaling when changing res, switching to match height resolved the issue.