(Copied from original User Voice forum)
"The Render View could be made to be much more useful. A proper render history view with thumbnails that keeps every current render for that scene, it is simple to clear them all later, and annoying to have to press keep image every time. There are many other features that could be added. Cinema 4D has done a very could job with their current image viewer so that is a good place to start. I would love to have a feature set similar to that render view.
Also something that is just more responsive overall while rendering. Being able to zoom and maintain full control of what is happening while the render is taking place."
"... doing a render in maya locks up the entire program until it's finished! How about the ability to render and work at the same time?"
"- A threaded Render View to be able to manipulate Maya stuffs during rendering. - A well tested and crash safe progressive rendering in the Render View because now, many will use progressive rendering to have a quick feedback of the whole lighting. - You should be able to click on a pixel and have a menu with three entry: Material/Light/Geometry (and maybe others like Textures). Each of this three entry should list a list of material/light/geometry used by the samples of this pixel. Once you've selected a material/light or geometry from the list, it should show it in the Attribute Editor. This is a major feature that could increase a lot the whole rendering workflow. - Possibility to display render layers directly in the Render View. - In a "Render history list", you should have a list of every render you've made (with thumbnail of course), this list should stay, even if you close your session. A button with "clear render history" could be provided. - From this render history, you could define a "A" and a "B" render (see the next part). - A Diff tool should help to check what pixels are differents from different renders (A and B). - A wipe tool (left/right, top/bottom, or manual, like Nuke one) should help to quickly change from the image A to the other (B). - A textual diff tool should display render time differences (Between A and B). - A "watched nodes" list could be provide. For every render you launch, the attributes values would be stored and, with A and B, you could compare two render (in the Render View, you have the both render images with, below each of them, a list of different values in your watched nodes). This could help a lot during lookdev and/or tweaking. - Exposure/Gamma shouldn't be changed in the Attribute Editor. It should be changed directly in the Render View and the Render View should be 32bit by default. - Addind textual note to an entry of the render history. - GLSL shaders on the Render View with layer access. - A one click way to save every render in the Render History List with a preseted naming pattern (foo.####.exr) and file options (compressions). - A threaded Render View (yes, again 😉 ) to be able check your Render History (and every idea I've purpose) during the current render and start to tweak some others attributes for the next render."
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