(The attached pdf seemed corrupted. I have added 3 jpgs instead).
I have finally given up trying to resolve this issue by myself. I am posting in the hope that someone can guide me towards the answer so that i don't have to render twice and fix in post :|
If i place a billboard behind my scene to cast reflections from the photo on my water, i can't project the image through the glass onto the water without embedding the image in the glass material.
I have attached a pdf which hopefully helps to explain the issue....
Page 1.
The basic setup in 3dsmax, with the object and material properties. Nothing too complex. Just basic glass materials and a corona Light material for the billboard. The checkboxes "visible to refractions" and "visible to reflections" do what they are supposed to do, but I can only assume that i am doing something wrong, or there is another checkbox somewhere.
Page 2.
The main image shows what happens when i check "reflections only'. It renders as you would expect... however it can't penetrate the glass, to project the image onto the waters surface. The background override (black) appears on the waters surface instead of the billboard image.
If i select the 'visible to refractions' it projects the image onto the water.... but now the image embeds itself IN the glass.
Page 3.
Shows the final image with the glass and water reflection appearing as you would expect. However to get this result, i have to render two passes to remove what i don't want. Annoying.
I would be most grateful for any suggestions.
