PBR - Receive Shadows from Another Object?

[Starflare]

Hello!

I have an issue I hope you can help me with.

I'll put you in context and hope I can give you enough information. Let's say I have a PBR floor exported with diffuse, rough, metal and normal from 3DSMax with the Babylon plugin, as well as the environment texture for reflections. I would like to put a ball on this floor that casts a shadow over it, but for some reason it isn't working. It does work with a standard material, but not the PBR.

Does this have to do with the 3DSMax export? Am I missing something in code? Should I tweak the shader somehow?

 

Thank you for the help in advance!

[GameMonetize]

So there is no reason for the PBR to not get the shadow:

https://www.babylonjs-playground.com/#10D6YT#40

Can you try to repro in the PG? Using simple sphere and boxes 

[dzen]

https://www.babylonjs-playground.com/#10D6YT#46

Here you can see that the initial helmet doesn't get a shadow.

[alvov]

Is it true that we should only use the PBRMaterial, and not the PBRMetallicRoughnessMaterial to be able to use the lightmapTexture?

Also does the 3dsMax-to-babylon exporter currently supports the PBRMaterial material?

[Starflare]

@alvov and @dzen are helping me out with this too  

So in the playground we made two helmets next to each other, but the helmet on top is clearly not casting a shadow over the helmet on the bottom. You can see it here: https://www.babylonjs-playground.com/#10D6YT#46

 

Are we missing something?

Thank you for your time!

[Sebavan]

Hello,

Here is a scene trying to explain the issues: https://www.babylonjs-playground.com/#10D6YT#49

First, you have 2 lights in your scene so I disposed the first one to isolate the shadow. Then using blurred shadow on a close range will create artifacts so I switched to hard shadow for the demo.

From this point we can see a bit of shadow on the helmet (https://www.babylonjs-playground.com/#10D6YT#50): 

 

But why not hard ??? This comes from all the indirect light received by the helmet so let s turn it of (https://www.babylonjs-playground.com/#10D6YT#51):

So I have to admit it is not intuitive and easy to setup hence why I want to work quite a lot on Shadow for 3.2 :-)

Hope this helps,