Merge pull request #17486 from supereggbert/vsmdocs

Docs: Add note about shadow receivers in VSM

docs/api/en/constants/Renderer.html

@@ -47,7 +47,7 @@
 		[page:constant BasicShadowMap] gives unfiltered shadow maps - fastest, but lowest quality.<br />
 		[page:constant PCFShadowMap] filters shadow maps using the Percentage-Closer Filtering (PCF) algorithm (default).<br />
 		[page:constant PCFSoftShadowMap] filters shadow maps using the Percentage-Closer Soft Shadows (PCSS) algorithm.<br />
-		[page:constant VSMShadowMap] filters shadow maps using the Variance Shadow Map (VSM) algorithm.
+		[page:constant VSMShadowMap] filters shadow maps using the Variance Shadow Map (VSM) algorithm. When using VSMShadowMap all shadow receivers will also cast shadows.
 		</p>
 
 		<h2>Tone Mapping</h2>