Hey Ivaylo,
I have a quick question here: We commonly use the VrayScannedMtl in a BumpMtl to give certain scans a different appearance. However, we do get very harsh cutoff lines (shadow terminator is the correct term I believe). A simple VrMtl with the same bump map looks better. I know there were some fixes made to one of the last releases in that regards, can this be done to the VrayScannedMtl as well?
VrayScannedMtl in a BumpMtl
VrMtl in a BumpMtl
Regards
Oliver
You mean the shadow terminator is sharp only with bumped material, but if the same “naked” material is placed over a curved geometry the terminator is OK?
Sounds strange, i will investigate it
Can’t reproduce the problem, could you attach a scene (if possible, max2017 format)?
Few months ago some issues related to VRayBumpMtl were fixed, it may be related to this fix, so it’s possible that since the end of october the bug is resolved.
Scene file is sent to you, Ivaylo.
Simply set the bump amount to 0 and the strong terminator should go away.
hmmm, can’t find the mail with the scene, i suppose you sent it to my mail, not to support or something like that?
No, directly to your mail.
I just sent it again.
Hello…?
well, modern problems, the mail was in the spam (not clear why), the spam folder was invisible… anyway, the scene is here, thanks
Maybe the filter has an issue with our links to the FTP server.
Are you able to reproduce the issue?
No, it renders black, and there is message “The Object XRef file: “…\Int_Sportback_v01.max” can not be found”. Is it the object that is rendered?
No. The Xref message is because of some helper object in the scene. You need to have bercon noise installed, but it happens with any map inside the BumpMtl.
There are no other messages for missing components. Btw, i can’t see the geometry in the viewport, would you tell me the name of the object, to check in the object list?
Still renders black, and the xreff message is still here. Look, is it possible to reproduce it from scratch? If this happen only in this scene, ok, then it’s kind of bug or something specific. But you said that in VRayMtl the situation was the same, and some fix was provided. So, it must be fundamental issue, and should be possible to recreate it from scratch. I tried without success, but may be you can reproduce it using the important points in your scene.
Ivaylo,
please find attached a very simple file. Simply relink the provided bump map, and put in the basemtl slot a ScannedMtl with material “fabric_grey_s.vrscan” from the library. The terminator appears. Set bump amount to 0 and it disappears.
shadow_terminator_teapot.zip (2.9 MB)
the issue is reproduced, thanks!
Sorry it took so long, I have no idea what was going on in the original file.
the fix should be in the nightlies already
