Shadows in my dungeon don't work

[ryvo]

Hi, I'm new to BabylonJS and I need an advice concerning shadows. In the attached project I tried to make a little dungeon. There's a torch mounted on one wall with. The torch is the only source of the light in the cave. Walls behind the wall the torch is mounted on should be in the shadow but they are lit. I don't know why the shadow doesn't work. Please advise.

Thanks in advance. Vojtech.

dungeon.zip

[Temechon]

Hello, 

 

Welcome  

I looked at your code, and I didn't see any problems linked to your game.

I understood the issue you are trying to solve, and I reproduced it in a playground : http://www.babylonjs-playground.com/#1AUY9H#1

 

The question is: why is the second wall lighten ?

[ryvo]

Hello Temechon, thank you for your efforts. Yes, the question is why the wall behind is lighten. Your code is working. I'v changed it a bit so that it does exactly what my dungeon code does. I made original meshes invisible and created their visible instances. See http://www.babylonjs-playground.com/#1AUY9H#2     Each changed line is preceded by comment "// RYVO". The result doesn't look correct. Is there a bug in Babylonjs?

 

Another example showing that instances of meshes do not drop shaddow is here http://babylonjs-playground.com/#1HRVL5#0    I create mesh instances not to load a mesh n-times for each wall.

[chg]

In Temechon's PG try:

shadowGenerator.setDarkness(0.0);

ie. It's lit because of the limitations of lighting and shadows - if the shadow is not complete blackness then the effects of lighting are not completely cancelled out (in real life shadows are an absence of of light, in realtime graphics they are a tint draw over the scene after it has been lit/shaded)

[ryvo]

Thank you chg. I set shadowGenerator.setDarkness(0.0); In the code here:  http://babylonjs-playground.com/#1HRVL5#1

I understand that if the shaddow darkness is > 0 then the shaddow won't be completely dark. But there's no shadow at all.

[chg]

Thank you Advanced Member. I set shadowGenerator.setDarkness(0.0); In the code here:  http://babylonjs-playground.com/#1HRVL5#1

I understand that if the shaddow darkness is > 0 then the shaddow won't be completely dark. But there's no shadow at all.

Oh, I'm not that kind of advanced member, I don't even use Babylon... so I won't even try and figure out why you're not getting a shadow there (ok, I tried a little but it wasn't anything that jumps out to a non-babylon user such as myself)

Note: to Babylon people - you're wiki here: https://github.com/BabylonJS/Babylon.js/wiki/15-Shadows suggests only directional lights can cast shadows, I'm assuming that needs to be updated and is outdated info...

 

NB: Seems to work if the instance of frontBox (frontBoxInstance) doesn't cast the shadow http://babylonjs-playground.com/#1HRVL5#2 shows are meant to be supported on instances I'm sure so that's odd

[ryvo]

Thank you chg. I'll create a new thread and report it as a bug.