🐛 [BUG]使用L7集成threejs，使用gltf作为layer，出现图层崩溃的bug

### 🐛 Bug description [Please make everyone to understand it]

> Please provide a link by forking these links [L7 Draw](https://codesandbox.io/s/l7draw-issue-template-df75t7) or GitHub repo, a minimal reproduction.
这个bug比较隐蔽，具体是webgl崩溃引起的，代码太多不好提供。
- _Required_ **Link to minimal reproduction**:

### 📷 Step to reproduce
1，使用L7的RasterLayer加载本地xyz瓦片。
2，使用scene addImage 加载本地图片资源。
3，集成threejs，并且加载gltf图层。
4，使用L7Darw画图形的时候，整个RasterLayer会被 addImage使用的资源覆盖。
5，控制台中，显示WebGL: INVALID_ENUM: activeTexture: texture unit out of range

### 🏞 Expected result

### 🚑 Any additional [like screenshots]

- **L7Draw Version**:
- **Platform**:

Start by reproducing the listed sequence: load local XYZ tiles with RasterLayer, add a local image with scene.addImage, integrate Three.js with a glTF layer, and draw with L7Draw. Confirm whether RasterLayer is covered and whether the console reports WebGL INVALID_ENUM: activeTexture: texture unit out of range; done means the layers render together without the crash.

Written by the indexing model from the issue text.