Can no longer render background self illumination plates.

[JD3D_CGI]

I feel like I am taking crazy pills.

So, I'm starting a new interior scene in Max 2018 Vray RT (latest version of both) and I realise the background plate I almost always use (from a Evermotion scene) is rendering as grey.

But I knew it worked in my old scene - so I go back to the old scene (attached images) - in both 2018 and 2015 (the scene it was created in) - and sure enough, although the scene was orignally rendering fine, it seems like Vray has broken, because the background is rendering flat grey now.

It's simply a cylinder with a self illumination value of 6.

You can see the old render, rendered correctly, and the quick grab I did after starting it again with what is a later version of Vray.

What's happening??

[dimension3plus]

Hey JD,
did you set the mapping type to standard? I had something similar with a sky dome I use pretty often.
Best Regards
Olaf

[JD3D_CGI]

Which mapping type? This is just a self illuminated material on a cylinder outside the room, not a sky dome with hdri

[yavor.rubenov]

Hello,

Could you share the scene here or with our support ? Just the cylinder with the self illuminated material and some simple geometry for the room should be enough.

Also could you write exactly which version of V-Ray are you using now and in which the backplate worked as you expected ?

Best regards,
Yavor

[dimension3plus]

My sky dome was also just plain geometry but with a VrayHDRI Map mapping type spherical. And this is not rendering with GPU only 3ds max standard.
Best regards,
Olaf

[JD3D_CGI]

Here is the file and image background

https://www.dropbox.com/s/cczhhqgwwh...issue.zip?dl=0


Please note that during the lightcache phase you can see the image through the windows, but once the rendering phase begins the image is grey.

[dimension3plus]

I was curios, tried you scene and had the same bug. (max 2018 + vray rt 3.60.03). But it's gone when turning off the direct illumination checkbox in the vraylightmtl. Or when using a vraymtl and put the map in the self illum slot with gi on is working here. Seems like a bug.
Best regards,
Olaf

[matanov]

It's not a bug. It's just that now the Indirect Illumination toggle is working in GPU and it turns the geometry into a mesh light but mesh lights in GPU don't support texturing. Just turn the option off and you should be fine (it was always off in GPU before).

[JD3D_CGI]

I tend to think of things that don't work properly between ADV and RT as bugs, especially when I am taking assets from one scene to another. Is there any way this can be flagged or adjusted by VRAT RT to avoid this kind of confusion?

[JD3D_CGI]

Can firm - it does work!