Also it always applies some degrading, changing size minimises it. ie it
doesn't concatenate
Howard
>________________________________
> From: Ari Rubenstein <[email protected]>
>To: Nuke user discussion <[email protected]>
>Sent: Wednesday, 12 September 2012, 19:20
>Subject: Re: [Nuke-users] scanline render uv proj and applyMaterial degrading
>the orginal image
>
>You need to apply a Constant at a higher resolution, plug it into your scan
>line that outputs the UV.
>
>Your problem is that the texture your using, when fit into UV space has now
>lost resolution because of the smaller uv region it occupies. By rendering the
>uv higher res it'll retain the source texture's full resolution (with minimal
>filtering to degrade it).
>
>Ari
>Blue Sky
>
>Sent from my iPhone
>
>On Sep 12, 2012, at 1:51 PM, Jason P Nguyen <[email protected]> wrote:
>
>> Has anyone realize that after unwrapping the uv through scanline render &
>> use that as a material with the ApplyMaterial node & render back out with
>> another scanline render node would degrading the image's quality?
>> I"m attaching 2 images here if anyone want to check.
>>
>> below is the script:
>> _________________________________
>>
>>
>> set cut_paste_input [stack 0]
>> version 6.3 v8
>> BackdropNode {
>> inputs 0
>> name BackdropNode33
>> tile_color 0x7171c600
>> label "just for testing,\nI plugged the mat into the uv to check the
>>quality of the image.\n(obviously for realworld shot, it would just be a roto
>>or paint, not the entire image)"
>> note_font_size 12
>> selected true
>> xpos 7256
>> ypos -6502
>> bdwidth 668
>> bdheight 572
>> }
>> push $cut_paste_input
>> Dot {
>> name Dot170
>> selected true
>> xpos 7817
>> ypos -6419
>> hide_input true
>> }
>> NoOp {
>> name mmCAMERA4
>> selected true
>> xpos 7783
>> ypos -6398
>> }
>> set Nfe724ef0 [stack 0]
>> Dot {
>> name Dot175
>> selected true
>> xpos 7894
>> ypos -5987
>> hide_input true
>> }
>> push $Nfe724ef0
>> push 0
>> Project3D {
>> inputs 2
>> name Project3D2
>> selected true
>> xpos 7640
>> ypos -6398
>> }
>> Card2 {
>> translate {740 -15 499.9987793}
>> rotate {-90 90 0}
>> uniform_scale 2000
>> control_points {3 3 3 6
>>
>> 1 {-0.5 -0.5 0} 0 {0.1666666865 0 0} 0 {0 0 0} 0 {0 0.1666666865 0} 0 {0 0
>> 0} 0 {0 0 0}
>> 1 {0 -0.5 0} 0 {0.1666666716 0 0} 0 {-0.1666666716 0 0} 0 {0 0.1666666865 0}
>> 0 {0 0 0} 0 {0.5 0 0}
>> 1 {0.5 -0.5 0} 0 {0 0 0} 0 {-0.1666666865 0 0} 0 {0 0.1666666865 0} 0 {0 0
>> 0} 0 {1 0 0}
>> 1 {-0.5 0 0} 0 {0.1666666865 0 0} 0 {0 0 0} 0 {0 0.1666666716 0} 0 {0
>> -0.1666666716 0} 0 {0 0.5 0}
>> 1 {0 0 0} 0 {0.1666666716 0 0} 0 {-0.1666666716 0 0} 0 {0 0.1666666716 0} 0
>> {0 -0.1666666716 0} 0 {0.5 0.5 0}
>> 1 {0.5 0 0} 0 {0 0 0} 0 {-0.1666666865 0 0} 0 {0 0.1666666716 0} 0 {0
>> -0.1666666716 0} 0 {1 0.5 0}
>> 1 {-0.5 0.5 0} 0 {0.1666666865 0 0} 0 {0 0 0} 0 {0 0 0} 0 {0 -0.1666666865
>> 0} 0 {0 1 0}
>> 1 {0 0.5 0} 0 {0.1666666716 0 0} 0 {-0.1666666716 0 0} 0 {0 0 0} 0 {0
>> -0.1666666865 0} 0 {0.5 1 0}
>> 1 {0.5 0.5 0} 0 {0 0 0} 0 {-0.1666666865 0 0} 0 {0 0 0} 0 {0 -0.1666666865
>> 0} 0 {1 1 0} }
>> name Card1
>> selected true
>> xpos 7640
>> ypos -6350
>> }
>> Dot {
>> name Dot217
>> selected true
>> xpos 7674
>> ypos -6323
>> }
>> set Nfe6c1350 [stack 0]
>> Constant {
>> inputs 0
>> channels {rgba.red rgba.green rgba.blue none}
>> format "2048 2048 0 0 2048 2048 1 square_2K"
>> name Constant19
>> label "square 2K"
>> selected true
>> xpos 7360
>> ypos -6285
>> }
>> ScanlineRender {
>> inputs 2
>> projection_mode uv
>> output_motion_vectors_type accurate
>> MB_channel forward
>> name UV_MAP2
>> selected true
>> xpos 7510
>> ypos -6249
>> }
>> push $Nfe6c1350
>> Dot {
>> name Dot236
>> selected true
>> xpos 7784
>> ypos -6235
>> }
>> ApplyMaterial {
>> inputs 2
>> name ApplyMaterial8
>> selected true
>> xpos 7750
>> ypos -6086
>> }
>> Constant {
>> inputs 0
>> channels {rgba.red rgba.green rgba.blue none}
>> format "2253 1188 0 0 2253 1188 1 --OBL_DCI_2k (+10%)"
>> name Constant20
>> label "2K 10% OverScan"
>> selected true
>> xpos 7568
>> ypos -6026
>> }
>> ScanlineRender {
>> inputs 3
>> ztest_enabled false
>> output_motion_vectors_type accurate
>> MB_channel forward
>> name CAM_RENDER8
>> selected true
>> xpos 7750
>> ypos -5990
>> }
>>
>> <after_uv_unwrap.png>
>> <original_plate.png>
>> _______________________________________________
>> Nuke-users mailing list
>> [email protected], http://forums.thefoundry.co.uk/
>> http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users
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