I'm finding a few bugs here and there and I'm not sure if they're caused by Mental Ray or by Maya 4.5. I know it's a beta version of MR but here are the bugs anyway:
Whenever I have the attribute editor open whilst rendering with MR, the attribute editor changes to the node previous to the one I was editing. Which is really annoying when tweaking values.
Using displacement mapping on poly objects in MR crashes Maya.
Sometime my rendering menu (and renderer) doesn't work unless I toggle back and forth between MR and normal Maya renderer.
In one of my new scenes the right mouse button menu option to 'add new material' or even 'add existing material' has gone, and an error about "building popup menu" comes up.
The worst bug is that this version of MR has big troubles with larger amount of polys. There is no way to render more than 6-700.000 polys. At least on my dual 2Giga with 1 Giga RAM. Ths new XSI has already a new version of MR, i think it's 3.1.3.16 and this one apparently solved this problem. The free MR for maya is v. 3.1.2.13. Does anyone know if there's a way to update it? Cheers
Maya will not shut down after using MR, it just sits at a CMD prompt and I have to force quit Maya.... It has to be MR because with out the plugin loaded I can use maya for days stright and have no problem shuting it down.....
I am using displacement on polys in the new version of MR(1.5). I built the model in Maya 4.5 and the model(s) I am having trouble with were built in other programs or in previous versions of Maya. I have also used an area light when rendering out the displacement tests and it seems to be a reasonable time frame. Was your model built in Maya 4.5? I have gotten it to crash when using displacement AND final gathering or Global Illumination. I am wondering if it has this much trouble with displacing a Nurbs surface -
It seems that if you parent a 3d textureplacement under a joint node, the texture that this node is placing disappears in the render, but this needs to be verified -MD
I using a 2d texture node with a Tif file - I have used a 3d texture node like fractal and it displaced a poly sphere - but when trying to use a 3d node on a high poly mesh - it did crash - I know that MR likes Tif files and not tgas -
"Maya will not shut down after using MR, it just sits at a CMD prompt and I have to force it to quit Maya...." ~ Hyper3D
I have that problem too!
And the way I was using diplacement for polys was not the normal way, I was putting the map into the Mental Ray displacement slot. It works fine with NURBS.
Oh and with my problem of the 'add new/existing material' menus not working, I've discovered that it only happens on NURBS cylinders that are capped!!!
If I create a non-capped NURBS cylinder it works fine, but if I make a capped one it causes the error. I can still use the menu on other objects in the scene, just not the capped cylinder, weird.
One thing that bugs me about public release betas is that noone gives feedback to A|W to get the issues resolved. have they even released a 2nd beta since the first came out? has anyone even bothered to say "hey A|W; when I do this and that I get this instead of that heres how to reproduce please fix"? This is the point of beta testing. Include any scene data or whatever just help make a better product... okay rant over.
when I render a scene with caustics in Mental Ray 1.5 , the renderer crashes .....but if I close the renderer and re- render it does it in a second....but then if I move my geometry around, the caustic doesn't update in the renderer, therefore it stays put, away from the geometry I just moved.....it's just freaking bugged man, it frustrates me so freaking much.....!!!!!....and it can't be my comp. Im running on an Athlon 2.2 and a gig of Ram, with a Quadro 2 Pro.....so I doubt it's my system...
"Maya will not shut down after using MR, it just sits at a CMD prompt and I have to force quit Maya.... It has to be MR because with out the plugin loaded I can use maya for days stright and have no problem shuting it down..... "