Interlaced output problem

Can someone please tell me how to get Resolve 15 to field render transitions so they are fluid in movement, as they should be?
The clips can certainly be rendered as interlaced, although there are very limited options to do so, but all transitions remain progressive and therefore are not fluid at all.

I'm surprised that no one has answered my question so far.
With almost the entire worlds TV broadcast industry based on interlacing, I can not believe that an editing platform with the status of DR is unable to handle interlacing correctly.
Surely there is a solution within Davinci Resolve and I have just missed it. I would appreciate a solution. Thanks in advance

A lot of effects processing and resizing works much better when the footage is progressive.

If you are doing effects processing and resizing I would recommend to deinterlace (without discarding any frames, i.e. turn each field into a separate frame), apply the effects and then interlace if you need to deliver your footage interlaced.

How do you suggest it should be done within DR?

How do you suggest it should be done within DR?

I would suggest to deinterlace outside of DR.

You can deinterlace media in Resolve.

Just select all the clips and go into Clip Properties...

Then select Deinterlace.

You can deinterlace media in Resolve.

Just select all the clips and go into Clip Properties...

Then select Deinterlace.

Yes you can but it decimates every other frame, 60i becomes 30p not 60p.

To do a quality deinterlacing I would strongly recommend to use a tool that does motion compensation based deinterlacing and that does not decimate every other frame.

Yes, but it doesn't offer to keep the temporal resolution by deinterlacing into two frames. And it's not a very advanced algorithm, no masking of areas without motion, for example.

Is this typically done with interpolation or line doubling to make a 60p stream?

I'm curious what tools are best for this. I'm working with some interlaced source material and will be outputting all to progressive. I know AviSynth TempGaussMC used to be the go to tool and may still be.

Is this typically done with interpolation or line doubling to make a 60p stream?

I'm curious what tools are best for this. I'm working with some interlaced source material and will be outputting all to progressive. I know AviSynth TempGaussMC used to be the go to tool and may still be.

I use QTGMC.

Typically each field is turned into a frame, this way you get the same cadence and a higher resolution. You can actually deinterlace this way lossless by creating the other field from the prior, current and next frame using motion compensation, but the best way is to adjust both the original and the created field, but the result will no longer be lossless.

Yes you can but it decimates every other frame, 60i becomes 30p not 60p.

To do a quality deinterlacing I would strongly recommend to use a tool that does motion compensation based deinterlacing and that does not decimate every other frame.

You are correct the DR deinterlace is not really an option.
If I have to do it outside, then Avisynth is by far the best way.
A typical 25i PAL Avisynth script, that I would use would be something like:
Process before editing:
Clip=("D:\Input clip.mp4")
V1=LWLibavVideoSource(Clip)
A1=LWLibavAudioSource(Clip)
V2=V1.tdeint(mode=1)
AudioDub(V2,A1)
AssumeFPS(50)

Process after editing:
Clip=("D:\ Output clip.mp4")
V1=LWLibavVideoSource(Clip)
A1=LWLibavAudioSource(Clip)
AudioDub(V1,A1)
AssumeFrameBased()
SeparateFields()
SelectEvery(4,0,3)
Weave()
AssumeTFF()
AssumeFPS(25)

What a time consuming process that really only achieves the intended and technically correct output for TV.
Without proper interlacing moving text looks terrible and is so much harder to read, therefore less effective This is especially the case at 25fps.
It makes DR certainly seems a poor excuse for an up-market editing program which is marketed for all production!!!
To think that the developers of DR have not considered the huge TV industry as being important.
I think that industry deserves a lot better consideration from the developers.
I know they have a lot on their plate at the moment but this should have been one of the first issues to be addressed a long time ago.
They certainly should drop the interlacing option altogether if they don't intend fixing it, that way the TV industry does not broadcast material that is half right.

You may wonder why I am so harsh, but I am over so much software being developed that has all the bells a whistles, but fails on the basics.

Version 15 seems to be about integrating all the tools together. I hope that 16 is about getting these type of things and other details right.

One can only hope!!!!