Sorry if this is a stupid question:
I have made a fluid simulation, using an Offset value of -20 so that the fluid does not start to flow until 20 frames into the animation. However, now during the first 19 frames before the fluid sim kicks in, my fluid domain object is visible and blocks the camera from seeing anything inside that object. If I change the material of the domain object to 100% transparent, then this also changes the material of the fluid itself, which is not what I want.
How can I make the fluid domain object invisible, without also affecting the material of the fluid itself?
Here is the render at frame 19, before the fluid sim begins. The only thing visible is the domain object, reflecting the light from an emission plane behind and to the left of the camera:
Here is the render at frame 20, the first frame on which the fluid sim is calculated, with everything inside the fluid domain cube now visible (the fluid itself is still out of frame to the top):
Finally, here is the render later on, showing the fluid (with the same material as the domain object):
Thanks in advance for any suggestions,