Fix: when shadows are disabled, light contribution still needs to be considered

Author: OndrejSpanel

examples/jsm/csm/CSMShader.js

@@ -162,15 +162,15 @@ IncidentLight directLight;
 
 		}
 		#pragma unroll_loop_end
-	#else
+	#elif defined (USE_SHADOWMAP)
 
 		#pragma unroll_loop_start
 		for ( int i = 0; i < NUM_DIR_LIGHTS; i ++ ) {
 
 			directionalLight = directionalLights[ i ];
 			getDirectionalLightInfo( directionalLight, directLight );
 
-			#if defined( USE_SHADOWMAP ) && ( UNROLLED_LOOP_INDEX < NUM_DIR_LIGHT_SHADOWS )
+			#if ( UNROLLED_LOOP_INDEX < NUM_DIR_LIGHT_SHADOWS )
 
 				directionalLightShadow = directionalLightShadows[ i ];
 				if(linearDepth >= CSM_cascades[UNROLLED_LOOP_INDEX].x && linearDepth < CSM_cascades[UNROLLED_LOOP_INDEX].y) directLight.color *= ( directLight.visible && receiveShadow ) ? getShadow( directionalShadowMap[ i ], directionalLightShadow.shadowMapSize, directionalLightShadow.shadowBias, directionalLightShadow.shadowRadius, vDirectionalShadowCoord[ i ] ) : 1.0;
@@ -182,6 +182,12 @@ IncidentLight directLight;
 		}
 		#pragma unroll_loop_end
 
+	#else
+
+		// note: no loop here - all CSM lights are in fact one light only
+		getDirectionalLightInfo( directionalLights[0], directLight );
+		RE_Direct( directLight, geometryPosition, geometryNormal, geometryViewDir, geometryClearcoatNormal, material, reflectedLight );
+
 	#endif
 
 	#if ( NUM_DIR_LIGHTS > NUM_DIR_LIGHT_SHADOWS)