I have some objects I would like to appear & disappear during the render. Under 2.7 I was able to set keyframes using Materials, Transparency, ZTransparency. When the Alpha & Specular sliders were set to 0, the object was invisible. When they were set to 1.0 the object was fully visible.
Everything I’m finding in 2.8 seems geared toward an object always being in one state or the other.
Is there some way of setting keyframes for transparency? (Hopefully, one that doesn’t require coding.)
Add a mix shader at the end with main material in the first slot and transparency shader in the second. Transparency is then controlled using the mix factor and can be animated.
you can even use a sphere gradient from the origin as the mix and change it’s scale to ‘wipe’ a object in
or use( localZ - 1/2 height) + time-> fill in from the ground up star trek style
The animation portion works but it’s not going to “clear”.
The material starts with a UV texture/material. With the transparent BSDF set to white the object goes from colored to a black hole. With the transpaent BSDF set to black, it starts with black and goes to color. It never goes to “clear”.
Sounds wonderful but I’m not sure how to use a gradient on an object. I’ll look into it.
You need to set blending to Alpha Blend instead of Opaque.
did that - I can go from clear to about half-visible or from solid to half-invisible with Fac going from 0-1.
Just did an alpha clipped with threshold of .521 and the object goes from solid to clear (all in the last frame)
(geometry position - object info origin)-------mapping node ---- texture (gradient) -> mix shader value
Thanks.
so far I’ve had the best luck with:
Image Texture
Principled BSDF - alpha slider is animated
Material Output.
Under Settings both Blend & Shadow mode are set to Alpha Hashed.
This gives a fairly constant fade from clear to solid.