diff --git a/src/components/renderer/RenderNode.ts b/src/components/renderer/RenderNode.ts
index 5df939fa..a2359794 100644
--- a/src/components/renderer/RenderNode.ts
+++ b/src/components/renderer/RenderNode.ts
@@ -372,8 +372,11 @@ export class RenderNode extends ComponentBase {
             return;
         let renderNode = this;
         let worldMatrix = renderNode.transform._worldMatrix;
-        for (let i = 0; i < renderNode.materials.length; i++) {
-            const material = renderNode.materials[i];
+
+        const nCount = Math.max(renderNode.materials.length, renderNode._geometry.subGeometries.length);
+        
+        for (let i = 0; i < nCount; i++) {
+            const material = i >= renderNode.materials.length ? renderNode.materials[0] : renderNode.materials[i];
             if (!material || !material.enable)
                 continue;
 
@@ -409,7 +412,7 @@ export class RenderNode extends ComponentBase {
                     if (noneShare) {
                         ProfilerUtil.viewCount_pipeline(view, PassType[passType]);
                     }
-                    let subGeometry = renderNode._geometry.subGeometries[i];
+                    let subGeometry = i >= renderNode._geometry.subGeometries.length ? renderNode._geometry.subGeometries[0] : renderNode._geometry.subGeometries[i];
                     let lodInfos = subGeometry.lodLevels;
                     let lodInfo = lodInfos[renderNode.lodLevel];
 
diff --git a/src/shape/CylinderGeometry.ts b/src/shape/CylinderGeometry.ts
index 0a853237..0ef785d5 100644
--- a/src/shape/CylinderGeometry.ts
+++ b/src/shape/CylinderGeometry.ts
@@ -74,7 +74,7 @@ export class CylinderGeometry extends GeometryBase {
      * @param count 
      * @param index 
      */
-    private addGroup(start, count, index) {
+    private addGroup(start: number, count: number, index: number) {
         this.addSubGeometry({
             indexStart: start,
             indexCount: count,
@@ -92,13 +92,13 @@ export class CylinderGeometry extends GeometryBase {
         this.radialSegments = Math.floor(this.radialSegments);
         this.heightSegments = Math.floor(this.heightSegments);
 
-        const vertices = [];
-        const normals = [];
-        const uvs = [];
-        const indices = [];
+        const vertices: number[] = [];
+        const normals: number[] = [];
+        const uvs: number[] = [];
+        const indices: number[] = [];
 
         let index = 0;
-        const indexArray = [];
+        const indexArray: number[][] = [];
         const halfHeight = this.height / 2;
         let groupStart = 0;
 
@@ -137,7 +137,11 @@ export class CylinderGeometry extends GeometryBase {
                 for (let x = 0; x <= that.radialSegments; x++) {
                     const u = x / that.radialSegments;
 
-                    const theta = u * that.thetaLength + that.thetaStart;
+                    let theta = u * that.thetaLength + that.thetaStart;
+
+                    if (x == that.radialSegments && Math.abs(that.thetaLength - that.thetaStart) == Math.PI * 2) {
+                        theta = 0 * that.thetaLength + that.thetaStart;
+                    }
 
                     const sinTheta = Math.sin(theta);
                     const cosTheta = Math.cos(theta);
@@ -179,7 +183,7 @@ export class CylinderGeometry extends GeometryBase {
             groupStart += groupCount;
         }
 
-        function generateCap(top) {
+        function generateCap(top: boolean) {
             const centerIndexStart = index;
 
             const uv = new Vector2();