虚拟现实（VR）在照明领域是一种很有前途的工具，无论是在设计还是在研究应用方面。尽管已经对这个话题进行了一些研究，但关于虚拟现实的实际优势的观点是相互矛盾的。目前尚不清楚虚拟现实软件是否能够正确模拟空间光分布，以及虚拟现实中再现的光感是否代表真实光感。本文修改了有关该主题的文献，然后测试了虚拟现实仿真软件Unreal Engine（UE）在计算光下的可靠性。为此，在试验室中进行照度测量，并将获得的值与使用UE和DIVA计算的犀牛值进行比较。结果表明，UE和真实值之间的百分比差异在-2%到5%之间，UE和DIVA之间的百分比差异在-2%到5%之间- 4%-0%。

Virtual Reality (VR) seems a promising tool in lighting field, both for design and research applications. Despite several studies have been conducted on this topic, the opinions about the actual advantages of VR are conflicting. It is not clear if VR software are able to properly simulate spatial light distribution, and if the luminous sensation reproduced in Virtual Reality is representative of the real one. The paper revises the literature about the topic and then tests the reliability of a VR simulation software, Unreal Engine (UE), in calculating light. To do that, illuminance measurements were performed in a test room and the obtained values were compared with those calculated with both UE and DIVA for Rhinoceros. Results demonstrated that the percentage differences between the UEs and the real values range from -2% to 5% and those between UE and DIVA from -4% to 0%.