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I am trying to help, with all my limitations. I am no expert, or anything close, by no means …I am just a user. If for some reason I am not helping, please let me know. Ok, this is interesting and probably a base for a solution. So, if I understood it correctly it relies on transformations for parallel axonometric system. And at the moment, Affinity Designer has the Rotation and Skew/shear transformations. Scale transformation apparently is also present, for what I understood, but doesn't have a visible control for the user (at least to my knowledge, see image below), which I think it should have. Well, trying to use the same principle that Affinity already uses, without changing the underlying geometry itself, the transformations could also be used to achieve the illusion of "Perspective". Some new transformations would be required, but also useful for other effects and adjustments. So, some transformations useful for achieving this illusion could be Scale, Rotation, Skew/shear, Stretch/compression, "Perspective" (Incline or tilt). Note, that when I say "perspective" transformation I say some like the image below, where you can incline or tilt (probably there is a better name). So, this combine with Skew/shear could be possible to get different placements along the "z-axis", and combine with the Scale and Stretch/compression different placements along the "y-axis". And the combinations between this transformations controls, would also allow many more non-destructive effects and adjustments. Or, a Distort or/and a Warp transformations, but more controls are necessary for this. By the way, now that we are talking about transformations (non-destructive and with controls), that can achieve other illusions and effects, why not Reflection (Flip / mirror). So useful! Let just say, that It's possible (to my knowledge), to partially and manually "undo", at least the Rotation and Shear/Skew, putting back to 0, but because there is no scale transformation control visible, one can't put that back to 0. So it isn't an a full manual "undo". The possibility to "undo" would be very useful, manually or automatically. But if Affinity Designer preserves the width, height (not the original geometry, but the current one) and the scale transformation, it is possible to change only the scale value, and the current width and height are preserve or not? So, the scale transformation is used to calculate the new dimensions (width and height). This could be used for the illusion of "perspective" as well, as for example, putting back the original size of a place image (very useful). Let me put this very clear, I really don't want Affinity Designer to become a 3D software. For 3D I use other softwares, better suitable for that purpose. This is just an ideia, still in it early stages I suppose … it worth what is worth! I try to explained the best that I could, but I don't know if is making sense or not. But if, it's really not possible using the current Document Model, or other reason, then the use destructive deformations this is better than nothing. But one of the thinks that I really like about Affinity Designer is the possibility to work with so many non-destructive options. But anyway, probably this is not the way to go. I just hope it helps in particular way!

Like I said before I really don't know the technical implications, but the point of his post is that this features are necessary. That's why we see "Perspective Grid" in Adobe Illustrator or even "Vanishing Point" in Adobe Photoshop. So, I would like it to see something like "Perspective Grid" (if you like) in Affinity Designer. The ability to edit, place objects and transform (to name a few things) in planes is very useful, especial if it's done in a non destructive way. One, needs the ability to later change things and recover the original form of the objects. I don't think tools like Lazy Nezumi Pro can fill the requirements that I pointed out above, but they can be very helpful and importante in drawing with pointing devices … must like rulers (and alike) with pencils on paper. Probably, software like that should come with every pen table or other point device for professional use, or even in the operation system … how know's. Thanks for explain what you know, it would be nice to talk more about it (and some links to the sources would be nice)…but I don't know if it's possible or advisable to deviate from the post. Anyway, I just like to say that probably it wasn't clear when I gave the example of the process on paper, or you just simple remove it from the context to make a point. But, if we are talking "not that simple ", and "rigorous" and "geometry of optics", we could talk even about 3d software, lens cameras, even the human eye it self… Hey, some could even argue that everything about this media it not accurate or real, it's just illusions to trick our mind… This is not suppose to be scientific rigorous, that is another field…not the target of Affinity Designer software, I supposed. Away, better to simplify and just focus on the topic.

I really don't know the technical implications, but like Ben, JET_Affinity and Frozen Death Knight said this is not that complex, like 3D engines, and also not new. So thanks the context and extra info! But I do know, that on paper, is easy, it's a long process in drawings, but the process of making it possible is not rocket science. It's just vanishing points where the lines of a given axis (or plane) converge/meet. That is great, even without the promise. Thanks for that, and I wish you the best! And if I may, know that you talk about guides, I never quite understood why no oblique line guides or other types of guides come as standard. Not to mention to auto define and update the 3 thirds rule, golden ratio, rectangle, … The Tool "Lazy Nezumi Pro" as Frozen Death Knight mentioned appears to be a very cool tool indeed …unfortunately is only for windows (no Mac and no Linux). I have found some similar tool for Mac (it is called "Hej Stylus" for those who are wondering) but no quite like the Lazy Nezumi Pro, and no vanishing points to make the illusion of perspective using vanishing points. Anyway, I still think this is necessary as a standard at any software drawing, and others tools like that to assist the process of drawing. Thanks once again!

Affinity Designer already has a grid and axis manager, to select diferente types of grids, like isometric, dimetric, …. Also it also has the isometric panel, that change planes to edit or fit objects in a given plane. A new option of grid could be developed to do perspective drawings, like on paper with One Point Perspective or Two Point Perspective, that uses vanishing points to create the illusion of depth in an drawing. And probably using a similar organization of isometric drawings. This use of the geometry in the grid and panel, would be very useful for to make this type of drawings. Now, we need to create lines to achieve this, and it is not practical or productive. Does anyone also finds this useful? Cheers

I thinking of buying the Affinity Designer application and I would like to know: - Can I Install in all the computers that I use (at the moment one Desktop and one Laptop)? There is a limit? Or the limit is the user only? - Do you sell direct (meaning not buying in the Apple App Store)? - Do you have special prices for upgrading? - In future minor upgrades it all by the App Store or direct download? - Is there a direct email for support? - How does this work or where can I find more info? Thanks!