360 degree rendering

Raghuram_Kalyanam · June 26, 2017, 2:37pm

Hi All,

I wanted to render a 360 degree image ( precisely to see it in VR glasses). I tried the options -vta, -vts options in rpict with not much success. It would be very helpful if some one could let me know the right options or some relevant info.

Best Regards,
Raghu

Greg_Ward · June 26, 2017, 2:57pm

Hi Raghu,

Mark Stock created the attached file "view360stereo.cal" that makes a 360° stereo panorama in the standard format for such viewers. This was checked into the Radiance HEAD back in January.

Cheers,
-Greg

view360stereo.cal (1.93 KB)

Raghuram_Kalyanam · June 30, 2017, 11:26am

Thanks Greg. That was helpful. I generated the VR images. Could I get only get the 360 degree projection only for one eye using that cal file, if so which variable should i tweak. Here <https://seafile.rlp.net/f/5c3a3a6aeecb42faa3de/?dl=1> is a sample image i wanted to produce.

Also there is lot of noise in the picture and appears grainy. I increased -ab but it didn't improve much. i tried other parameters, here is a glimpse of the command.

X=2048; Y=2048; cnt $Y $X | rcalc -f view360stereo.cal -e "XD:$X;YD:$Y;X:0;Y:0;Z:1.25;IPD:0.06;EX:0;EZ:0" | rtrace -dp 4096 -ar 256 -ds .02 -dj .9 -dt .05 -dc .75 -dr 3 -ss 16 -st .01 -ab 5 -aa .03 -ad 1024 -as 512 -lr 12 -lw 1e-5 -x $X -y $Y -fac scene.oct > out4.hdr <https://seafile.rlp.net/f/7f343d2d476e43b2b546/?dl=1>

Best Regards,
Raghu

···

On Jun 26, 2017, at 4:57 PM, Greg Ward <[email protected]> wrote:

Hi Raghu,

Mark Stock created the attached file "view360stereo.cal" that makes a 360° stereo panorama in the standard format for such viewers. This was checked into the Radiance HEAD back in January.

Cheers,
-Greg

<view360stereo.cal>_______________________________________________
Radiance-general mailing list
[email protected]
https://www.radiance-online.org/mailman/listinfo/radiance-general

Mark_Stock · June 30, 2017, 2:27pm

Raghu,

An easy, though somewhat inefficient, way to get a single-eye view
without digging into the script would be to change the IPD to 0.

Mark

···

On 6/30/17, Raghuram Kalyanam <[email protected]> wrote:

Thanks Greg. That was helpful. I generated the VR images. Could I get only
get the 360 degree projection only for one eye using that cal file, if so
which variable should i tweak. Here
<https://seafile.rlp.net/f/5c3a3a6aeecb42faa3de/?dl=1> is a sample image i
wanted to produce.

Also there is lot of noise in the picture and appears grainy. I increased
-ab but it didn't improve much. i tried other parameters, here is a glimpse
of the command.

X=2048; Y=2048; cnt $Y $X | rcalc -f view360stereo.cal -e
"XD:$X;YD:$Y;X:0;Y:0;Z:1.25;IPD:0.06;EX:0;EZ:0" | rtrace -dp 4096 -ar 256
-ds .02 -dj .9 -dt .05 -dc .75 -dr 3 -ss 16 -st .01 -ab 5 -aa .03 -ad 1024
-as 512 -lr 12 -lw 1e-5 -x $X -y $Y -fac scene.oct > out4.hdr
<https://seafile.rlp.net/f/7f343d2d476e43b2b546/?dl=1>

Best Regards,
Raghu

On Jun 26, 2017, at 4:57 PM, Greg Ward <[email protected]> wrote:

Hi Raghu,

Mark Stock created the attached file "view360stereo.cal" that makes a 360°
stereo panorama in the standard format for such viewers. This was checked
into the Radiance HEAD back in January.

Cheers,
-Greg

<view360stereo.cal>_______________________________________________
Radiance-general mailing list
[email protected]
https://www.radiance-online.org/mailman/listinfo/radiance-general

Raghuram_Kalyanam · June 30, 2017, 2:38pm

Hi Mark,

Thanks for answering, I tried with IPD 0 and its still same. I changed the default to also zero in cal file. Any idea how do i improve the graininess of the picture?

Best Regards,
Raghu

···

On Jun 30, 2017, at 4:27 PM, Mark Stock <[email protected]> wrote:

Raghu,

An easy, though somewhat inefficient, way to get a single-eye view
without digging into the script would be to change the IPD to 0.

Mark

On 6/30/17, Raghuram Kalyanam <[email protected]> wrote:

Thanks Greg. That was helpful. I generated the VR images. Could I get only
get the 360 degree projection only for one eye using that cal file, if so
which variable should i tweak. Here
<https://seafile.rlp.net/f/5c3a3a6aeecb42faa3de/?dl=1> is a sample image i
wanted to produce.

Also there is lot of noise in the picture and appears grainy. I increased
-ab but it didn't improve much. i tried other parameters, here is a glimpse
of the command.

X=2048; Y=2048; cnt $Y $X | rcalc -f view360stereo.cal -e
"XD:$X;YD:$Y;X:0;Y:0;Z:1.25;IPD:0.06;EX:0;EZ:0" | rtrace -dp 4096 -ar 256
-ds .02 -dj .9 -dt .05 -dc .75 -dr 3 -ss 16 -st .01 -ab 5 -aa .03 -ad 1024
-as 512 -lr 12 -lw 1e-5 -x $X -y $Y -fac scene.oct > out4.hdr
<https://seafile.rlp.net/f/7f343d2d476e43b2b546/?dl=1>

Best Regards,
Raghu

On Jun 26, 2017, at 4:57 PM, Greg Ward <[email protected]> wrote:

Hi Raghu,

Mark Stock created the attached file "view360stereo.cal" that makes a 360°
stereo panorama in the standard format for such viewers. This was checked
into the Radiance HEAD back in January.

Cheers,
-Greg

<view360stereo.cal>_______________________________________________
Radiance-general mailing list
[email protected]
https://www.radiance-online.org/mailman/listinfo/radiance-general

_______________________________________________
Radiance-general mailing list
[email protected]
https://www.radiance-online.org/mailman/listinfo/radiance-general

Greg_Ward1 · June 30, 2017, 2:58pm

If you send me your input files and exact commands in a private message, I'll have a look. There's nothing in your parameters to explain your grainy results. My only guess at this point is that your light sources might be right triangles rather than rectangles, which screws up source sampling.

Cheers,
-Greg

···

Sent from my iPad

On Jun 30, 2017, at 9:08 PM, Raghuram Kalyanam <[email protected]> wrote:

Hi Mark,

Thanks for answering, I tried with IPD 0 and its still same. I changed the default to also zero in cal file. Any idea how do i improve the graininess of the picture?

Best Regards,
Raghu

On Jun 30, 2017, at 4:27 PM, Mark Stock <[email protected]> wrote:

Raghu,

An easy, though somewhat inefficient, way to get a single-eye view
without digging into the script would be to change the IPD to 0.

Mark

On 6/30/17, Raghuram Kalyanam <[email protected]> wrote:
Thanks Greg. That was helpful. I generated the VR images. Could I get only
get the 360 degree projection only for one eye using that cal file, if so
which variable should i tweak. Here
<https://seafile.rlp.net/f/5c3a3a6aeecb42faa3de/?dl=1> is a sample image i
wanted to produce.

Also there is lot of noise in the picture and appears grainy. I increased
-ab but it didn't improve much. i tried other parameters, here is a glimpse
of the command.

X=2048; Y=2048; cnt $Y $X | rcalc -f view360stereo.cal -e
"XD:$X;YD:$Y;X:0;Y:0;Z:1.25;IPD:0.06;EX:0;EZ:0" | rtrace -dp 4096 -ar 256
-ds .02 -dj .9 -dt .05 -dc .75 -dr 3 -ss 16 -st .01 -ab 5 -aa .03 -ad 1024
-as 512 -lr 12 -lw 1e-5 -x $X -y $Y -fac scene.oct > out4.hdr
<https://seafile.rlp.net/f/7f343d2d476e43b2b546/?dl=1>

Best Regards,
Raghu

On Jun 26, 2017, at 4:57 PM, Greg Ward <[email protected]> wrote:

Hi Raghu,

Mark Stock created the attached file "view360stereo.cal" that makes a 360°
stereo panorama in the standard format for such viewers. This was checked
into the Radiance HEAD back in January.

Cheers,
-Greg

<view360stereo.cal>_______________________________________________
Radiance-general mailing list
[email protected]
https://www.radiance-online.org/mailman/listinfo/radiance-general

_______________________________________________
Radiance-general mailing list
[email protected]
https://www.radiance-online.org/mailman/listinfo/radiance-general

_______________________________________________
Radiance-general mailing list
[email protected]
https://www.radiance-online.org/mailman/listinfo/radiance-general

Greg_Ward · July 1, 2017, 1:00am

Hi Raghu,

I had a look at your files. Thanks for providing a link.

Line 48 of the file Components/Group_1.rad has a duplicate real argument count, which causes this file not be be included:

## guessed Material

  void glass glass1_Group_1
  0
  0
  3 3 0.75 0.75 0.75

Deleting the second '3' above fixes the issue. If this file was generated automatically, you should talk to the people who wrote that software. It's also apparent that they aren't putting the proper dependencies into the "scene.rif" file. This should include lines like:

objects= Materials/[Color_M06].mat Materials/[Color_M05].mat Materials/glass3.mat Materials/glass1.mat Materials/Default_Material.mat
objects= Materials/[Color_M00].mat Materials/Lisanne_Boots.mat Materials/[Color_M04].mat Materials/Color_M1.mat

...and so on.

Also, the "guessed" materials are terrible. Most of them have 50% specular reflectance, which makes them metallic. This is probably the main cause of noise in your images. If you put in more reasonable material values, preferably with specularity less than 0.04 or so, your results will improve substantially. Reserve specularities above 0.05 for metallic materials.

Cheers,
-Greg

···

From: Raghuram Kalyanam <[email protected]>
Date: June 30, 2017 9:39:19 PM GMT+06:30

Hi Greg,

Thanks for answering, here are the files. I have tried out rvu also to check out, if normal image also the same (grainy). I guess you are right, it could be with the light sources. I am using only direct sun light. you can find it in sky.rad file.

The below command
rvu -vtc -vh 360 -vv 130 -vp 0 0 1.25 -vd 1 1 0 -n 4 -ab 7 -as 1024 scene.oct
results this image

Thanks & Regards,
Raghu

On Jun 30, 2017, at 4:58 PM, Greg Ward <[email protected]> wrote:

If you send me your input files and exact commands in a private message, I'll have a look. There's nothing in your parameters to explain your grainy results. My only guess at this point is that your light sources might be right triangles rather than rectangles, which screws up source sampling.

Cheers,
-Greg

Sent from my iPad

On Jun 30, 2017, at 9:08 PM, Raghuram Kalyanam <[email protected]> wrote:

Hi Mark,

Thanks for answering, I tried with IPD 0 and its still same. I changed the default to also zero in cal file. Any idea how do i improve the graininess of the picture?

Best Regards,
Raghu

On Jun 30, 2017, at 4:27 PM, Mark Stock <[email protected]> wrote:

Raghu,

An easy, though somewhat inefficient, way to get a single-eye view
without digging into the script would be to change the IPD to 0.

Mark

On 6/30/17, Raghuram Kalyanam <[email protected]> wrote:
Thanks Greg. That was helpful. I generated the VR images. Could I get only
get the 360 degree projection only for one eye using that cal file, if so
which variable should i tweak. Here
<https://seafile.rlp.net/f/5c3a3a6aeecb42faa3de/?dl=1> is a sample image i
wanted to produce.

Also there is lot of noise in the picture and appears grainy. I increased
-ab but it didn't improve much. i tried other parameters, here is a glimpse
of the command.

X=2048; Y=2048; cnt $Y $X | rcalc -f view360stereo.cal -e
"XD:$X;YD:$Y;X:0;Y:0;Z:1.25;IPD:0.06;EX:0;EZ:0" | rtrace -dp 4096 -ar 256
-ds .02 -dj .9 -dt .05 -dc .75 -dr 3 -ss 16 -st .01 -ab 5 -aa .03 -ad 1024
-as 512 -lr 12 -lw 1e-5 -x $X -y $Y -fac scene.oct > out4.hdr
<https://seafile.rlp.net/f/7f343d2d476e43b2b546/?dl=1>

Best Regards,
Raghu

On Jun 26, 2017, at 4:57 PM, Greg Ward <[email protected]> wrote:

Hi Raghu,

Mark Stock created the attached file "view360stereo.cal" that makes a 360°
stereo panorama in the standard format for such viewers. This was checked
into the Radiance HEAD back in January.

Cheers,
-Greg

<view360stereo.cal>

Raghuram_Kalyanam · July 2, 2017, 5:10pm

Thanks Greg, that was very helpful. It worked.

Best Regards,
Raghu

···

On Jul 1, 2017, at 3:00 AM, Gregory J. Ward <[email protected]> wrote:

Hi Raghu,

I had a look at your files. Thanks for providing a link.

Line 48 of the file Components/Group_1.rad has a duplicate real argument count, which causes this file not be be included:

  ## guessed Material

  void glass glass1_Group_1
  0
  0
  3 3 0.75 0.75 0.75

Deleting the second '3' above fixes the issue. If this file was generated automatically, you should talk to the people who wrote that software. It's also apparent that they aren't putting the proper dependencies into the "scene.rif" file. This should include lines like:

  objects= Materials/[Color_M06].mat Materials/[Color_M05].mat Materials/glass3.mat Materials/glass1.mat Materials/Default_Material.mat
  objects= Materials/[Color_M00].mat Materials/Lisanne_Boots.mat Materials/[Color_M04].mat Materials/Color_M1.mat

...and so on.

Also, the "guessed" materials are terrible. Most of them have 50% specular reflectance, which makes them metallic. This is probably the main cause of noise in your images. If you put in more reasonable material values, preferably with specularity less than 0.04 or so, your results will improve substantially. Reserve specularities above 0.05 for metallic materials.

Cheers,
-Greg

From: Raghuram Kalyanam <[email protected]>
Date: June 30, 2017 9:39:19 PM GMT+06:30

Hi Greg,

Thanks for answering, here are the files. I have tried out rvu also to check out, if normal image also the same (grainy). I guess you are right, it could be with the light sources. I am using only direct sun light. you can find it in sky.rad file.

The below command
rvu -vtc -vh 360 -vv 130 -vp 0 0 1.25 -vd 1 1 0 -n 4 -ab 7 -as 1024 scene.oct
results this image

Thanks & Regards,
Raghu

On Jun 30, 2017, at 4:58 PM, Greg Ward <[email protected]> wrote:

If you send me your input files and exact commands in a private message, I'll have a look. There's nothing in your parameters to explain your grainy results. My only guess at this point is that your light sources might be right triangles rather than rectangles, which screws up source sampling.

Cheers,
-Greg

Sent from my iPad

On Jun 30, 2017, at 9:08 PM, Raghuram Kalyanam <[email protected]> wrote:

Hi Mark,

Thanks for answering, I tried with IPD 0 and its still same. I changed the default to also zero in cal file. Any idea how do i improve the graininess of the picture?

Best Regards,
Raghu

On Jun 30, 2017, at 4:27 PM, Mark Stock <[email protected]> wrote:

Raghu,

An easy, though somewhat inefficient, way to get a single-eye view
without digging into the script would be to change the IPD to 0.

Mark

On 6/30/17, Raghuram Kalyanam <[email protected]> wrote:
Thanks Greg. That was helpful. I generated the VR images. Could I get only
get the 360 degree projection only for one eye using that cal file, if so
which variable should i tweak. Here
<https://seafile.rlp.net/f/5c3a3a6aeecb42faa3de/?dl=1> is a sample image i
wanted to produce.

Also there is lot of noise in the picture and appears grainy. I increased
-ab but it didn't improve much. i tried other parameters, here is a glimpse
of the command.

X=2048; Y=2048; cnt $Y $X | rcalc -f view360stereo.cal -e
"XD:$X;YD:$Y;X:0;Y:0;Z:1.25;IPD:0.06;EX:0;EZ:0" | rtrace -dp 4096 -ar 256
-ds .02 -dj .9 -dt .05 -dc .75 -dr 3 -ss 16 -st .01 -ab 5 -aa .03 -ad 1024
-as 512 -lr 12 -lw 1e-5 -x $X -y $Y -fac scene.oct > out4.hdr
<https://seafile.rlp.net/f/7f343d2d476e43b2b546/?dl=1>

Best Regards,
Raghu

On Jun 26, 2017, at 4:57 PM, Greg Ward <[email protected]> wrote:

Hi Raghu,

Mark Stock created the attached file "view360stereo.cal" that makes a 360°
stereo panorama in the standard format for such viewers. This was checked
into the Radiance HEAD back in January.

Cheers,
-Greg

<view360stereo.cal>