View Full Version : mental ray and opacity maps? (3DS Max 7)
10-09-2006, 09:01 PM
Hey guys I have a quick issue that im sure someone out there can help with. I have been playing around with mental ray some and have hit a small snag, I have a plane that I want to add a bitmap to and then use an opacity map to knock out the excess of the bitmap that I dont need so that the plane, when rendered is in the shape of the bitmap subject. Anyways I can't seem to get this to work with mental ray, it works fine with the default scanline renderer but it just turns the excess a solid black in mental ray. Right now its set up with the color bitmap in the diffuse slot and then the opacity map in the opacity slot, i'm not sure if there is something else I need to do to make this work in mental ray........
So pretty much any help on how to set up this material would be very greatly appreciated!!! Thanks in advance to whomever can help!
11-09-2006, 04:34 AM
Well, I didn't have any luck recreating that problem (Max 8 though). Any chance of a Mat Ed screenshot?
11-09-2006, 07:51 PM
Hey Trimyr, i'll post a screen of the material as soon as I get home this evening!
13-09-2006, 01:53 PM
Ok I tried this earlier and was unsuccesful so sorry on the delay but I keep getting an error when Im trying to upload stuff. So im unable to post a screenshot of the settings, however Right now I just have the fish bitmap in the diffuse slot and the mask in the opactiy slot and everything else is the default for a standard material.......
Also the error message is as follows:
There seems to have been a slight problem with the Threedy Forums database.
Please try again by pressing the refresh button in your browser.
An E-Mail has been dispatched to our Technical Staff, who you can also contact if the problem persists.
We apologise for any inconvenience.
I've refreshed repeatedly and nothing I'll try it from another computer toimorrow.
13-09-2006, 04:32 PM
You can put the image on http://imageshack.us/ and post the link ;) :D
13-09-2006, 05:38 PM
check out this topic (http://forums.3dtotal.com/showthread.php?t=44345), maybe it helps.
You also might want to try this tip:
Its an easy fix. Just stick the same map in your opacity slot and change the mono channel output to alpha.
If your using a raytracer material stick it in your transparency and do the same but you need to flip the alpha so go to output and check 'invert'.
(posted here (http://forums.3dtotal.com/showthread.php?t=44792))
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