WebGLBackend: Fix depth formats. (#30422)

src/renderers/webgl-fallback/utils/WebGLTextureUtils.js

@@ -261,7 +261,8 @@ class WebGLTextureUtils {
 
 		if ( glFormat === gl.DEPTH_COMPONENT ) {
 
-			if ( glType === gl.UNSIGNED_INT ) internalFormat = gl.DEPTH24_STENCIL8;
+			if ( glType === gl.UNSIGNED_SHORT ) internalFormat = gl.DEPTH_COMPONENT16;
+			if ( glType === gl.UNSIGNED_INT ) internalFormat = gl.DEPTH_COMPONENT24;
 			if ( glType === gl.FLOAT ) internalFormat = gl.DEPTH_COMPONENT32F;
 
 		}