From 146cf57a16d99633acbada4a4c342a9b031af2a1 Mon Sep 17 00:00:00 2001
From: Noeri Huisman <8823461+mrxz@users.noreply.github.com>
Date: Mon, 1 Jun 2026 13:05:05 +0200
Subject: [PATCH] Check for WEBGL_provoking_vertex extension

---
 src/SparkRenderer.ts | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/SparkRenderer.ts b/src/SparkRenderer.ts
index 2186d3fe..63a1e204 100644
--- a/src/SparkRenderer.ts
+++ b/src/SparkRenderer.ts
@@ -567,6 +567,16 @@ export class SparkRenderer extends THREE.Mesh {
     this.accumulators.push(new SplatAccumulator(accumulatorOptions));
     this.accumulators.push(new SplatAccumulator(accumulatorOptions));
 
+    // Check if the provoking vertex convention should be changed
+    const provokingVertexExt = this.renderer
+      .getContext()
+      .getExtension("WEBGL_provoking_vertex");
+    if (provokingVertexExt) {
+      provokingVertexExt.provokingVertexWEBGL(
+        provokingVertexExt.FIRST_VERTEX_CONVENTION_WEBGL,
+      );
+    }
+
     if (options.target) {
       const {
         width,