Arthur Spooner Posted May 7, 2016 Share Posted May 7, 2016 First time I've used Paint SOP. I've applied a constant shader to the object but I can't paint on the mesh, I read the instructions in the documentation a few times, the brush is working reading to paint, visually I don't see anything in the viewport ? Quote Link to comment Share on other sites More sharing options...
6ril Posted May 7, 2016 Share Posted May 7, 2016 (edited) hi, to use the paint sop, you need uv on your geo. (*edit* actually it works without the uvs. sorry : / (since it's painting points)) geo -> uv project -> paint sop paint sop will colour the POINTS, so it will be dependant of the resolution of you geo. here a little hip exemple (very basic on a grid) od_paintSOP.hipnc Edited May 7, 2016 by 6ril Quote Link to comment Share on other sites More sharing options...
Arthur Spooner Posted May 7, 2016 Author Share Posted May 7, 2016 (edited) ok Edited May 7, 2016 by Arthur Spooner Quote Link to comment Share on other sites More sharing options...
Arthur Spooner Posted May 7, 2016 Author Share Posted May 7, 2016 My paint sop scene, paint doesn't work ? as_paint_prob.hipnc Quote Link to comment Share on other sites More sharing options...
Guest tar Posted May 7, 2016 Share Posted May 7, 2016 Riddle this: render it and then look at you geometry spreadsheet for the Cd values. Hint: the geometry spreadsheet is your number one resource in Houdini to understanding. Quote Link to comment Share on other sites More sharing options...
Arthur Spooner Posted May 8, 2016 Author Share Posted May 8, 2016 30 minutes ago, marty said: Riddle this: render it and then look at you geometry spreadsheet for the Cd values. Hint: the geometry spreadsheet is your number one resource in Houdini to understanding. I understand I must override the color ? Quote Link to comment Share on other sites More sharing options...
Guest tar Posted May 8, 2016 Share Posted May 8, 2016 18 minutes ago, Arthur Spooner said: I understand I must override the color ? Can you show numerically how this would help please. Thanks! Quote Link to comment Share on other sites More sharing options...
Arthur Spooner Posted May 8, 2016 Author Share Posted May 8, 2016 (edited) That is my guess, I'm probably wrong but Cd.r = value ? That is what I guessed when looking in the Spreadsheet on Cd as to why I don't see anything in the viewport ? Edited May 8, 2016 by Arthur Spooner Quote Link to comment Share on other sites More sharing options...
Guest tar Posted May 8, 2016 Share Posted May 8, 2016 What is the range of values for r,g,b from the colour black to white? Then look at the spreadsheet and see what values the Cd attributes are set to. Quote Link to comment Share on other sites More sharing options...
Arthur Spooner Posted May 8, 2016 Author Share Posted May 8, 2016 The range for in the spread sheet for rgb is 1.8 to 1.0 (rgb) I entered the value for visualize attribute range 1.8 to 1.0, hoping that is what you mean ? Quote Link to comment Share on other sites More sharing options...
Guest tar Posted May 8, 2016 Share Posted May 8, 2016 No that isn't the correct answer. You seem to be missing elementary computer graphics knowledge, therefore you will be confused by everything. Please google the following: Tell us what the colour black is in R,G,B values? Tell us what the colour white is in R,G,B? values? Quote Link to comment Share on other sites More sharing options...
Arthur Spooner Posted May 8, 2016 Author Share Posted May 8, 2016 Black is 0,0,0 and white is 255*3 ! Quote Link to comment Share on other sites More sharing options...
Guest tar Posted May 8, 2016 Share Posted May 8, 2016 No -we don't use 8bit colour. Again in float values please. Quote Link to comment Share on other sites More sharing options...
Arthur Spooner Posted May 8, 2016 Author Share Posted May 8, 2016 I've read enough on this, I should know it ! 0 is black, and 1 is white. Quote Link to comment Share on other sites More sharing options...
Guest tar Posted May 8, 2016 Share Posted May 8, 2016 Correct - now you know this, go back though your questions and see why if the RGB attribute values, when they are over value of 1, which means white, don't show in the viewport. Quote Link to comment Share on other sites More sharing options...
Arthur Spooner Posted May 8, 2016 Author Share Posted May 8, 2016 I thought my answer was to apply a constant shader to the mesh, make it a color other then blue and then I would see the white I'm painting, instead my answer was wrong ? Quote Link to comment Share on other sites More sharing options...
Guest tar Posted May 8, 2016 Share Posted May 8, 2016 Well, painting blue works whether you add a shader or not. So looking at the spreadsheet again please read the values of the 'blue' colour. Quote Link to comment Share on other sites More sharing options...
6ril Posted May 8, 2016 Share Posted May 8, 2016 aouch! Quote Link to comment Share on other sites More sharing options...
Arthur Spooner Posted May 8, 2016 Author Share Posted May 8, 2016 9 hours ago, marty said: Well, painting blue works whether you add a shader or not. So looking at the spreadsheet again please read the values of the 'blue' colour. Blue is 1.0. Quote Link to comment Share on other sites More sharing options...
Guest tar Posted May 8, 2016 Share Posted May 8, 2016 5 hours ago, Arthur Spooner said: Blue is 1.0. I'm confused by your confusion. Have you used any computer painting software before? PaintSop works just like Photoshop or MSPaint. Quote Link to comment Share on other sites More sharing options...
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