Weirdly cast shadows

So eh… very simple build. Four pillars, four walls, a floor and a ceiling part.
Strangely enough there’s big gaps at the top, which shouldn’t be there when there’s a ‘roof’


This started being clear and visible after the change from Compatibility to Voxel lighting.
When running the game and taking a screenshot very rapidly you can roughly see what it used to look like. Then again, the roof/ceiling almost feels detached as there’s no shadows.

Compatibility used to see some slight shadows which:
/ didn’t make the walls and ceiling feel detached
/ kept slight shadows which visually didn’t create these dark squares and gaps


Toying around with slight surfacelights or duplicating the roof and turning one part semitransparent with shadows and the other nontransparent without castedshadow is a no-go.

Properties in Lighting & lighting effects don’t affect shadows

Any tips to lessen the shadows & to prevent his strange missing shadow patch?
And are these casted shadows a bug? I remember them talking about light bleeding or something with Compatibility, but a whole missing top part of the shadow seems more faulty than that :see_no_evil:

It’s always been an issue with thin wall and roof Parts. Lights bleed through at corners. There are many posts about it already, and the only real way to stop it is to use walls and roofs that are thicker.

LightingTechnology explains the difference between the lighting technologies.
Technology tells you how to adjust to make Voxel look more like ShadowMap

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“Compatibility lighting has an issue where very thin parts would often not cast a shadow correctly. We call this phenomenon “light bleeding” or “light leaking”. Voxel lighting has a tweak to shadow calculation which makes sure that parts which should cast a shadow actually do.” - ItsRainingPixels

This would mean the bleeding issue isn’t a thing anymore, how else can you consider it a ‘Compatibility Issue’ if Voxel sees the same.

Where does it mention that?

Whoops, should have typed Compatibility, not ShadowMap in that comment. It was late at night.

I don’t know of an actual physical fix. I’m pretty sure that most Technologies bleed light through the corners of thin walls. The only fix I’ve heard of is making the walls thick enough to not allow it to happen.

Ahh, I see now - no worries

Mhm. ye, not sure either. Wish there was a little more customisation when it comes to shadows. I conveyed some ideas around shadows a few months ago, but not sure if we’ll see improvements or additons anytime soon

You can try to fix it by creating a part that covers the entire building and placing it on top outside of the building

There’s a walkway on top, and part of the ceiling and be broken to enter from above :sweat_smile: