Using a mask to make part of an image chrome in IRAY

William W_ Connors

I am still learning my way around IRAY. I have a package to render which needs to have some areas of the surface designated as highly reflective. I assume there is a way to do this similar to the way you can apply a mask to an emissive surface. So...help?

nemesis10

I probably would use a geoshell.... 
1) get a copy of the UV map of your figure (generally, if you go to your account on the Daz3d wevsite and Product library, you should see the various methods to download your figure and a download for the template, a map of the UV's.
2) Open the the template in an image editor like Photoshop, Gimp etc...  and paint in where you want the chrome to be. Duplicate that image and invert the image and fill the non-chrome areas with black and the chrome areas with white. Save as a jpeg or png
3) load your figure, add a geoshell to the figure, apply the default Iray shader to the geoshell, apply the chrome shader to the geoshell and plugin the jpeg you made (a mask) to Cutoff Opacity setting of 100%.
4) Now, you have your perfect chrome bikini!

kenshaw011267

Find your shader presets folder and see if you have a chrome shader. You should. Find the object you to be to be chrome. Select it and open the surface tab. You should now have a list of all the surfaces of that object. Pick the ones you want to be chrome. Apply the chrome shader, you need the base object selected in the scene and the specific surface selected in the surfaces tab.

William W_ Connors

nemesis10 - PERFECT! Thank you for being so much smarter than I am. I had no idea you could do that!

 

nemesis10

williamwconnors_df1fc03390 said:

nemesis10 - PERFECT! Thank you for being so much smarter than I am. I had no idea you could do that!

 

Not smarter... just older.... One thing which is not intutive but makes great sense when you think aabout it is that a geoshell inherits the uv of the object it is created from.