Blender Stack Exchange is a question and answer site for people who use Blender to create 3D graphics, animations, or games. It only takes a minute to sign up.
Sign up to join this community
Is there a way to create a material that seems diffuse shader, but can see lights trough it when lights are behind like E.V.E. in Wall-e? I have tried diffuse mixed with gloss and both mixed add to transparent shader, but can see through all sides.
Here a picture of what I want to do.
I want to be able to see light from the camera side only when the light is on just like on EVE's chest.
There are various ways you could probably achieve this effect - one is to use a Refraction shader to allow light through in a specific direction and to scatter based on Roughness using the following setup :
Here the Diffuse shader provides the basic diffuse surface and the Refraction shaders are added to this to show through the illumination from behind.
I've added two Refraction shaders (the Mix shader can vary the reletive strengths) - one with a low Roughness for the 'sharp' image and the other with a high roughness for the 'glow' around it. The very high IOR of the first Refraction shader forces the rays that pass through the surface to mostly align with the surface normal - this forces the rays to form an image of what's behind the surface, without being affected by the viewing angle (as if the image of Suzanne is projected onto the surface). The second Refraction shader has high roughness and provides the 'glow' and by slightly reducing the IOR of that shader the 'glow' can be made to be more based on viewing angle - eg, in your first sample image of Eve the 'scatter' of the green on her chest is offset from the 'image' part; the lower IOR effectively mimics this.
Note that you can also change the colors of each of the Refraction shaders independently so as to tint the 'scatter' differently if required - or vary the Roughness for more/less scatter within the surface.
