[SOLVED]: DrawMeshInstancedIndirect subMesh Issues

reveriejake · October 25, 2020, 11:22pm

Hey guys/gals,

I posted this over on the URP section but the more I think about it the more I think it probably belongs in the general section since it may not relate to the URP.

I have been racking my brain on this issue. I’ve been toying around with the DrawMeshInstancedIndirect which has been working great so far. I have custom shaders that work as expected with models that have multiple subMeshes. My issue comes when I try to add multiple objects with the same material on them. For some reason the models display with missing faces. I tried the standard cube and it was missing a face just like the others.

I tried using a super simplified shader thinking that it was my shader code but came out with the same results. I posted a couple of images to show what the issue is.

CORRECT:

INCORRECT: (Missing Geometry)

Any suggestions or help would be fantastic!

Thanks,
Jake

reveriejake · October 26, 2020, 6:04am

Solved the issue with this code with help from Mike at taqoz.fyi. I was putting buffer info into a sharedMaterial which overwrote the previous submesh containing that same material.

View the solved code here:

gist.github.com

https://gist.github.com/reveriejake/b668119ecdccf8bcb267f2ea303b830d

InstancePrefab.cs

using UnityEngine;
using System.Collections.Generic;
using UnityEngine.Rendering;

namespace PicoGames.Prototype
{
    [System.Serializable]
    public class InstancePrefab
    {
        public GameObject prefab;

This file has been truncated. show original

PITestCase.cs

using UnityEngine;
using System.Collections.Generic;
using System.Collections;
using UnityEditor;

namespace PicoGames.Prototype
{
    public class PITestCase : MonoBehaviour
    {
        public int count = 5000;

This file has been truncated. show original

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[SOLVED]: DrawMeshInstancedIndirect subMesh Issues

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