Archived Old Bugs

[joe_b]

Re: weird window problems

I have occasional weird window problems.
Sometimes when I minimze Rhino I can't double-click it on the taskbar to get it back. I have to right click, restore.
Other times when I have two instances of Rhino running, I render, work on the other instance and try to come back- same thing.
Not very important but it seems like an odd glitch.

Yes, I've noticed that myself. I'll look into it further...it is a bit irritating

[joe_b]

Re: another not so important glitch

Along the same lines as other minor glitches, I have the Object Properties dialogue box docked to the right side of the Rhino Screen along with the Layers dialogue box. Sometimes after modifying the Mapping properties, I switch back to the Material properties and get this.

I'll see if this is caused by us or RCM. Thanks

[Micha_cg]

***PLEASE POST ALL BETA 13/13.1 BUGS HERE***

I have tested the "grid" at the diffuse color. Fine. Than I have set the same parameters at the bump. No effect. Procedurals seems not work for bump now.

[Micha_cg]

***PLEASE POST ALL BETA 13/13.1 BUGS HERE***

Hi,

if I render a simple empty glass, than it looks like it will be rendered without internal reflections.

Or did I something wrong?

Glass in a full HDRI environment


-Micha

[joe_b]

***PLEASE POST ALL BETA 13/13.1 BUGS HERE***

I have tested the "grid" at the diffuse color. Fine. Than I have set the same parameters at the bump. No effect. Procedurals seems not work for bump now.

Yes I think that was in the readme file. Currently only Bitmaps can be used as Bump maps.

[joe_b]

***PLEASE POST ALL BETA 13/13.1 BUGS HERE***

Hi,

if I render a simple empty glass, than it looks like it will be rendered without internal reflections.
-Micha

Could you send me the scene? My first thought would be to check your Max Depth in the global options rollout. Also check that reflect on backside is enabled and doublesided is disabled.

[Micha_cg]

***PLEASE POST ALL BETA 13/13.1 BUGS HERE***

Hi,

if I render a simple empty glass, than it looks like it will be rendered without internal reflections.
-Micha

Could you send me the scene? My first thought would be to check your Max Depth in the global options rollout. Also check that reflect on backside is enabled and doublesided is disabled.

Thank you Joe, the "doublesided" option was the problem. I don't understand the usage of the option for refractive material. A refractive material need two sides, one for the glass and one for the air. I feel, this option could be a pitfall for many new users. In the most cases, the double side option is right, because it makes the surface act like in the real world. Why should be a refractive material an exception? I think, after some weeks I will forget this difficult usage and fall again in the pitfall. What do you think? Could we disable the "doubleside" option if a refractive layer is used?

But, what is if I like to render a mix of standard diffuse and glass, like glass with a dust layer? Than it would be useful to use the diffuse with "doubleside", but the refactive layer need it disabled.

Could it be, that here is a Vray core engine bug? Should not work the user in double side mode allways without problems? Is the disabled double side not a trick to fake translucent surfaces? I would like, if the user must not touch this option for physical correct standard usage.

[joe_b]

***PLEASE POST ALL BETA 13/13.1 BUGS HERE***

Thank you Joe, the "doublesided" option was the problem. I don't understand the usage of the option for refractive material. A refractive material need two sides, one for the glass and one for the air. I feel, this option could be a pitfall for many new users. In the most cases, the double side option is right, because it makes the surface act like in the real world. Why should be a refractive material an exception? I think, after some weeks I will forget this difficult usage and fall again in the pitfall. What do you think? Could we disable the "doubleside" option if a refractive layer is used?

Yes, I was supposed to do this quite a long time ago but it keeps slipping my mind.

But, what is if I like to render a mix of standard diffuse and glass, like glass with a dust layer? Than it would be useful to use the diffuse with "doubleside", but the refactive layer need it disabled.

Could it be, that here is a Vray core engine bug? Should not work the user in double side mode allways without problems? Is the disabled double side not a trick to fake translucent surfaces? I would like, if the user must not touch this option for physical correct standard usage.

Well the double-sided property applys to the entire material, not to individual layers. I'm not sure if this would be considered a VRay bug or not

[Micha_cg]

***PLEASE POST ALL BETA 13/13.1 BUGS HERE***

Joe, I think the goal should be that the user can use a diffuse layer in "double side" mode and a working refractive layer in the same material. Maybe, a double side mode is never needed for the refractive layer and Vlado can fix the refractive layer to "single side" internal. Would be nice if Vlado could explain the "single side" issu for refractive layers here.

[flipside]

***PLEASE POST ALL BETA 13/13.1 BUGS HERE***

If you turn off double sided, this doesn't mean that your surface will be invisible from the backside. So a diffuse layer doesn't need to have the option turned on to work properly. But I also never really understood what it is used for, also thought it was there to fake a translucent effect on single surfaces.

[Micha_cg]

***PLEASE POST ALL BETA 13/13.1 BUGS HERE***

I know, but you forget, that if you disable double side and you have no light behind the surface, than the backside of the surface will be rendered black (!). Could be nice, if this is a bug.

I think, the disabled double side option should cause, that each surface show a addition of the lighting from both sides:

color = color (N) + color (-N) (N ... normal direction)

The current single side mode is not realy useful for me. For example you want to render thin leaves. You would need both sides colored.

I would like, if a user would not be interested on the translucent fake, the user could totaly forget to set this feature.

So, if we like to create a material with a mix of refraction and diffuse, we have a problem.

[flipside]

***PLEASE POST ALL BETA 13/13.1 BUGS HERE***

you have no light behind the surface, than the backside of the surface will be rendered black (!).

Hu? Why would an unlit surface side render as lit? Sounds like fake translucency to me!

[Micha_cg]

***PLEASE POST ALL BETA 13/13.1 BUGS HERE***

Maybe I have not explain it good enough. Simple experiment: take a plane copy it and flip the normals and press render (default light only). Both surfaces should be lit , but you will see that one surface is black and the other standard grey.
Backfaces of single side surface are rendered black, if no light is comimg from behind. The front lighting is ignored.

[nmda]

Tiling. Help.

oops i first posted in the wrong topic list.

I keep setting a map to Tile but everytime i open the scene again, the Tile box is unchecked.

[Micha_cg]

Re: Tiling. Help.

oops i first posted in the wrong topic list.
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