Semi-transparent materials and shadows
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TIG, I'm not sure I'm following you.
Here's a PNG image.
I imported it as a texture which is applied to a face.
It seems to be accepting shadows.
Or do you mean that if there are any transparent pixels in a PNG texture image, none of it will accept shadows?
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I also do not understand. I imported the stone texture as a PNG and it too seems to have no problems accepting the shadow
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Try a .png in which the pixels are transparent
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What's weird is how the shadow looks with different texture opacity settings -
72 percent
84 percent
99 percent
and 100 percent
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At 72% you're seeing the shadow on the ground. At 99% the texture isn't transparent enough to see through.
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Had to really think about that but then the "doh!" moment happened. Never would have figured that out on my own, thanks for explaining.
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To recap...
Materials with < 100% opacity [i.e. transparent] of any kind - plain-color/jpg/png etc - will never receive a shadow.
If they are >= 70% opacity they will cast shadows - unless they use certain types of texture file, see below...Textured materials that are NOT transparent [100% opaque] will receive and cast shadows, IF the texture file has NO 'transparency layer' defined - e.g. it's a JPG file...
BUT if the texture file is a PNG, AND it also has a 'transparency layer' defined, then it will not receive shadows, AND also it will never cast shadows - even if the material itself is set to be is 100% opaque.
BUT if the material's texture is a PNG file with no 'transparency layer' defined, then it can accept/cast shadows, just like if a JPG file had been used. -
Yeah, what he said
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There will be a test on this later and your score will count to your final result.
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