[MC-249343] Light sources create Ambient Occlusion

A light source shouldn't create Ambient Occlusion shadows, since the light they emit should realistically cast away the shadow.

Linked issues

causes 1

MC-301577 Block light sources produce shadows around themselves under skylight Open

relates to 2

MC-275014 Weathered and oxidized copper bulbs cast stronger shadows on themselves when lit with smooth lighting enabled Open

MC-225516 Smooth lighting doesn't work on blocks that emit light Open

Attachments

Comments 5

bodakugga 2022-03-27T19:51:12Z

This issue actually dates back to Beta 1.8, when the lighting system was rewritten. In versions from Beta 1.3 (smooth lighting was added in this version) to Beta 1.7.3, fully bright light-emitting blocks, such as glowstone, didn't cast any shadows. Lower light-emitting blocks, such as lit furnaces, used to cast some shadows, but they were not as strong as shadows caused by regular blocks.

I've uploaded a few screenshots in this imgur album, showcasing the different appearances of light-emitting blocks when smooth lighting is enabled in different versions.

Avoma 2022-05-31T13:39:58Z

I believe that this ticket is actually a duplicate of MC-161150. Both this report (MC-249343) and MC-161150 have been triaged with a priority of "Low" so I'm unsure as to which report should be made the parent ticket.

ampolive 2022-05-31T13:43:45Z

I don't think that it is the same issue. That issue is about low light emitting blocks darkening the cast shadows, this one is about all light emitting blocks casting these shadows in the first place. But there is some definite overlap between the two issues.

Avoma 2022-05-31T13:49:16Z

I do indeed see your point. If not a duplicate, then definitely related to MC-161150.

Avoma 2022-06-07T16:43:56Z

Can confirm in 1.19.