Digital Art Zone

i try to revers a plane added uber area lighting
and its succeed revers
light will illuminate form opposite direction

and i try revers a cube , but cube is like sphere the normal vector still outside
same as any closed geometric cylinder cone torus , normal always outside
whats going on

I do not think it’s the sphere.  I think there’s something else going on here…

Subbing an uber environment sphere for the primitive didn’t solve it. But the uber light shader itself is functioning properly on other primitive surfaces so that shouldn’t be the core issue either.

I tried a sphere with reversed normals I made in Hexagon… THAT did not work either.

I suspect this may be related to the fix for models flipped by negative scaling them appearing black. It may come down to a choice of the lesser evil if that’s so, since being able to reverse an item by scaling it to -100% is also a useful trick.

That does not explain what happened for wancow though. Vexing when something works..but only sometimes.

OMG I need to sleep now
i am from japan
so whatever thanks you a lot

Sorry it’s still unresoved… hopefully by the time you wake up, someone will have figured it out…

No one has said if there tried a Shpere from the Create Primative menu and not Uber Primatives. I can’t test anything as i don’t have assess to Daz Studio at all. Last time I used this was 4.5.1.6 and it worked on a Pimative Sphere. This is not to say that the latest version hasn’t go a bug regarding this.

I did try with a sphere from hexagon with reversed normals… should that not have worked?

No one has said if there tried a Shpere from the Create Primative menu and not Uber Primatives.

I did since that was the instructions in the tutorial. Also tried with a pre created environment sphere and that did not function either at 100 or -100.

Khory - 18 January 2013 06:26 PM

No one has said if there tried a Shpere from the Create Primative menu and not Uber Primatives.

I did since that was the instructions in the tutorial. Also tried with a pre created environment sphere and that did not function either at 100 or -100.

the regular Area Light Sphere worked for me when I scaled it negatively

incase you can’t read it, the sphere is scaled -4000%

uber Area light sphere negatively scaled to 3800% (thats -3800%)

ok just to be thorough, I ran through the tutorial the OP is attempting..
nice tutorial wish I discovered it sooner..

anyway, no issues on my end, did everything step by step with the video.

Well…some interesting points.

Just to check, I created a sphere in Blender. I flipped the normals, gave it a material and UV mapped it before export.  On import to DS I applied UA.  Rendered…inside lit up, outside black

Back to Blender…chopped the sphere in half, created an integral ‘floor’ assigned two materials (dome and floor).  Back in DS, assigned UA to the dome.  Rendered…inside lit up, outside black.

Then I applied SubD to is…Rendered…inside black…outside lit.

Then I created a DS primitive sphere…and black inside, no matter what the scaling is/was…