LuxRender official feature request thread

[patro]

The light group processing is done before the imaging pipeline (which includes gamma correction) this would be a rather intrusive change, and I'm not sure it'd bring much in practice. If you want your sky to be more blueish, why don't you apply a blue filter on it?

I think that we max user can't add a filter to the sky, LuxMax is different from LuxBlend.... we have control only about gain, sun size and turbidity.
probably to add a filter to the sky we need it to have as shader... as shader we can edit it in material editor... but max shaders aren't compatible with luxrender. I will pinpoint to Hedphelym to add the missing value A, B, C, D and E parameters as "float aconst", "float bconst" etc. that's way I asked for this small tool... a small tool to find as sub tool like the color piker for each created light layer.
I'm thinking about to ask to Hedphelym if there is a way to create an scripted external material and filter editor for luxrender.... similar to the one used from luxblend user.

a small preview render window in light group to see the result of all added and edited effects... before to waste time by adding it to the whole render.

This I really don't get, light group feedback is interactive in the whole render.

Jeanphi

I had think that this was impossible without an intrusive change... but lux have the update button in render UI. other render have this small window... and have also the update button. anyway it could be an idea for the future!

[jeanphi]

I think that we max user can't add a filter to the sky, LuxMax is different from LuxBlend....

I was just hinting to use the sky lightgroup color filter.

Jeanphi

[patro]

I think that we max user can't add a filter to the sky, LuxMax is different from LuxBlend....

I was just hinting to use the sky lightgroup color filter.

Jeanphi

ah OK. like I do here: viewtopic.php?f=36&t=4595&start=10#p48135
I understand now... how to use correctly the color piker in light group. thanks Jeanphi to let me think about....
see attached image as example
normal sky

wrong cruise poition... the horizon is near by fully override

right cruise position... the horizon is near by maintained.

but a contrast or hue-saturation tool will increase the blue from the sky(generic color)... by increasing difference between the sky and the transition part like the horizon by don't adding more color to the horizon/shadowed zone.

[patro]

hi Jeanphi,

please could you add as soon as possible the "environment background mapping function" - tilling, rotating etc. and also to avoid that the background image will loaded flipped?
thank you

Patro

[jeanphi]

please could you add as soon as possible the "environment background mapping function" - tilling, rotating etc. and also to avoid that the background image will loaded flipped?

Well, as soon as possible might not be soon I currently have very few time to spend developing LuxRender. I'd like to get out v0.7.1 first otherwise it will never be released.

Jeanphi

[Lord Crc]

please could you add as soon as possible the "environment background mapping function" - tilling, rotating etc. and also to avoid that the background image will loaded flipped?

I'm not exactly sure what you're asking for here, could you please elaborate? Infinite light (used for HDR environment maps) already supports rotation, and tiling makes little sense to me.

[patro]

I'm not exactly sure what you're asking for here, could you please elaborate? Infinite light (used for HDR environment maps) already supports rotation, and tiling makes little sense to me.

as I know isn't possible to rotate an image used as environment... around Z axis.
you can set an exr an jpg.. but I can't see a spinner to rotate the image like I want.
and I asked more than once about... and I got always the same answer: not supported at time!
I'm talking about a latlong image... to use as environment illumination and as background... if I load in 3dsmax viewport an latlong image, I can rotate the image... so to display the portion that I want but when I render the scene... the image isn't rotated like in my viewport and the image is rendered also flipped.
you are saying me that rotation is already supported.. OK... below is the exported code for the background environment image..please could you add the missing code part for rotate it?

#Env userprop F:\CAD\mappe\hrdi dds\StudioHDR\small 03.exr

# Enviromentmap goes here
AttributeBegin
LightGroup "environment"
LightSource "infinite"
"string mapping" ["latlong"]
"string mapname" ["F:\\CAD\\mappe\\hrdi dds\\StudioHDR\\small 03.exr"]
"float gamma" [1.0]
"float gain" [1.0]
AttributeEnd

thanks

PS: about tailing... consider the use of a small checker image...

[Lord Crc]

you are saying me that rotation is already supported.. OK... below is the exported code for the background environment image..please could you add the missing code part for rotate it?

Code: Select all

#Env userprop F:\CAD\mappe\hrdi dds\StudioHDR\small 03.exr

# Enviromentmap goes here
AttributeBegin

# rotate image 180 degrees around Z axis
Rotate 180.0  0 0 1

LightGroup "environment"
LightSource "infinite"
"string mapping" ["latlong"]
"string mapname" ["F:\\CAD\\mappe\\hrdi dds\\StudioHDR\\small 03.exr"]
"float gamma" [1.0]
"float gain" [1.0]
AttributeEnd

This is already exposed in LuxBlend. Rotations are supported, I tried flipping around the standard axes by scaling by -1, which seems to work, however I don't know the exact limits for which kind of transformations are allowed. Perhaps jeanphi can elaborate?

[patro]

I can't understand! I asked more than once for something like this:

# rotate image 180 degrees around Z axis
Rotate 180.0 0 0 1

but the answer wasn't: rotation supported and tailing no.

thanks a lot... I will pinpoint this to Hedphelym to add this part to the exporter.

[Lord Crc]

I can't understand! I asked more than once for something like this

Hmm only I can think of then is that you must have been misunderstood. At least we got it sorted now

Please note that the rotation/transformation is applied independently of the mapping (ie angular, latlong).

edit: that said, tiling is not supported. Again I can't see why this is useful, it would give incorrect/weird lighting.