Probably a really simple solution but still one that I am missing.
See attached image. That’s showing the alpha channel of a render of a handle on a shelfdoor.
What I want do do is very straight forward. Set door do matte, alpha -1, shadows and affect alpha checked in Direct light property box. What I expect from this is a render where the handle is rendered in the alpha channel and the door is not. I want the shadows to be visible as a gradient in the alpha channel. But NOOO - ain’t gonna happen. Why?
This is an scene I have taken over from an old project and it’s not me who created the scene. If I set up a new scene with some dummy objects it all works out just fine.
I have tried to merge the scene to a new file but as soon as I have merged anything from the “corrupt” scene the problem appears. It also doesn’t matter on what objects I do this. Even if I create two new objects and render I get the same problem as in attached image.
Anyone ever experienced anything like this before?
It doesn’t matter if I change the settings in the vray object properties or if I add a material wrapper material - same result.
I have also tried to save the scene to an older maxversion (max2015, max2014 etc) with no luck.
If I set the door to alpha -1 but doesn’t check the matte checkbox it works out alright - but then I don’t get the gradient in the alpha channel that I want - and need.
FYI:
Hmm - it seems as if it’s something to do with the dome light(with a VrayHDRI assigned). If I uncheck the “cast shadows” checkbox in the dome lights options dialog it works as I want it to.
Thanks tambyra. I never use other than vraymaterials but since this is a scene I have not created myself you never know what weird stuff one might find…
Unfortunately no. It gets better than before but still not as it’s supposed to be. It wasn’t the materials either - there are only vraymaterials in the scene. I don’t use the materialwrapper but when I switch to that just to try I get the same result…
On your material under reflection → affect channels do you have it on anything other then color only? If not reflections will affect your alpha. If that’s even the issue.
Thanks for the tip frothlord but unfortunately that doesn’t help. I have tried with all variations selected in the reflection rollout just to eliminate that as an issue.
Thank you Zdravko - I will do that.
I will not be att the office for a couple of days but when I get back I will upload a scene either here or to the support.
