@danvas (danvas) posted a new topic, subject "Light is escaping enclosed mesh!". It read:

   Hi,  
    I have a pointLight inside a polysphere (with phong shader), but I don't know why the light is bouncing off the small, exterior sphere.  
    The pointLight's ray trace shadows are on.  
    The small sphere is not lit, so the large sphere appears to be trapping the light inside - yet, the small sphere is showing up lit in the reflection. (See 2nd image.)  
    How can I prevent the light from hitting the small sphere?  
    My only workaround is to unlink the pointLight from the small sphere. (See the last image.)  
    I feel like I'm missing something simple; I hope you can give me some hints.  
    Thanks!  
    d

So @Woody370 (Woody370) replied

    What if you made the big sphere double sided? That should solve your problem but then again it may not. Let me know if it dosn't

So @CerpinTaxt (CerpinTaxt) replied

    You need to increase your shadow trace depth. It's in the Render Globals -> Quality -> Raytracing and in your point light it's the Ray Depth Limit.

To which @CGTalk_Moderation (CGTalk_Moderation) replied

    This thread has been automatically closed as it remained inactive for 12 months. If you wish to continue the discussion, please create a new thread in the appropriate forum.


{'source': 'discourse', 'url': 'https://forums.cgsociety.org/t/light-is-escaping-enclosed-mesh/1516643', 'title': 'Light is escaping enclosed mesh!', 'views': 137, 'has_accepted_answer': False, 'word_count': 280, 'like_count': 0, 'reply_count': 1, 'participant_count': 4, 'posts': 4, 'tags': '', 'author': '@danvas (danvas)', 'participants': '@danvas (danvas), @Woody370 (Woody370), @CerpinTaxt (CerpinTaxt), @CGTalk_Moderation (CGTalk_Moderation)', 'image_url': '', 'created_at': '2011-05-16T23:29:46.000Z', 'last_posted_at': '2011-05-18T06:58:03.000Z'}