https://mr0ptimist.github.io/tags/renderdoc/Recent content in RenderDoc on MrOptimistHugozh-cnMon, 20 Apr 2026 00:00:00 +0000https://mr0ptimist.github.io/posts/ue%E7%BA%B9%E7%90%86%E6%B5%81%E9%80%81%E6%B1%A0%E4%B8%8Eshader%E8%B0%83%E8%AF%95cvar%E9%80%9F%E6%9F%A5/Mon, 20 Apr 2026 00:00:00 +0000https://mr0ptimist.github.io/posts/ue%E7%BA%B9%E7%90%86%E6%B5%81%E9%80%81%E6%B1%A0%E4%B8%8Eshader%E8%B0%83%E8%AF%95cvar%E9%80%9F%E6%9F%A5/<h2 id="纹理流送池">纹理流送池</h2> <p>UE 根据流送池预算决定纹理加载哪些 mip level，超出预算时低优先级纹理只加载低分辨率 mip，控制台输出 <code>Texture streaming pool over X MB</code> 警告。</p> <h3 id="查询与调整">查询与调整</h3> <div class="highlight"><pre tabindex="0" style="color:#f8f8f2;background-color:#272822;-moz-tab-size:4;-o-tab-size:4;tab-size:4;-webkit-text-size-adjust:none;"><code class="language-cpp" data-lang="cpp"><span style="display:flex;"><span><span style="color:#75715e">// 运行时查询当前值 </span></span></span><span style="display:flex;"><span>r.Streaming.PoolSize </span></span><span style="display:flex;"><span> </span></span><span style="display:flex;"><span><span style="color:#75715e">// 运行时修改（单位 MiB） </span></span></span><span style="display:flex;"><span>r.Streaming.PoolSize <span style="color:#ae81ff">3000</span> </span></span></code></pre></div><h3 id="永久设置">永久设置</h3> <p>在 <code>DefaultEngine.ini</code> 中：</p> <div class="highlight"><pre tabindex="0" style="color:#f8f8f2;background-color:#272822;-moz-tab-size:4;-o-tab-size:4;tab-size:4;-webkit-text-size-adjust:none;"><code class="language-ini" data-lang="ini"><span style="display:flex;"><span><span style="color:#66d9ef">[/Script/Engine.RendererSettings]</span> </span></span><span style="display:flex;"><span><span style="color:#a6e22e">r.Streaming.PoolSize</span><span style="color:#f92672">=</span><span style="color:#e6db74">3000</span> </span></span></code></pre></div><h3 id="诊断命令">诊断命令</h3> <table> <thead> <tr> <th>命令</th> <th>用途</th> </tr> </thead> <tbody> <tr> <td><code>stat streaming</code></td> <td>查看池使用量、各纹理流送状态</td> </tr> <tr> <td><code>ListStreamingTextures</code></td> <td>列出所有流送纹理及占用</td> </tr> <tr> <td><code>r.Streaming.MaxTempMemoryAllowed</code></td> <td>临时内存上限，过小也会导致流送卡顿</td> </tr> </tbody> </table> <h3 id="常见原因与对策">常见原因与对策</h3> <table> <thead> <tr> <th>原因</th> <th>对策</th> </tr> </thead> <tbody> <tr> <td>纹理分辨率过高 / mip 过多</td> <td>降低 TextureGroup 的 MaxLOD 或分辨率</td> </tr> <tr> <td>UDIM / 大量贴图同时可见</td> <td>拆分 LOD、降低远处 mip</td> </tr> <tr> <td>预算本身设太小</td> <td>合理提高 PoolSize（需匹配目标显存）</td> </tr> <tr> <td>纹理未设 Streaming</td> <td>确认 Texture → Never Stream 未勾选</td> </tr> </tbody> </table> <hr> <h2 id="shader-调试-cvar">Shader 调试 CVar</h2> <p>在 RenderDoc 中查看 Compute Shader 源码，需在 <code>ConsoleVariables.ini</code> 的 <code>[Startup]</code> 段配置以下 CVar：</p>